单选题 Read the following text. Choose the best word for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. Although the size of the workforce depends a great deal on the size of the total population, there are several other influences which also affect it. The age distribution of the total population has a very {{U}}(21) {{/U}} effect on the available workforce. If the population has a high {{U}}(22) {{/U}} of very young people or of {{U}}(23) {{/U}} too old to work, then the available workforce would be lower than {{U}}(24) {{/U}} there were an {{U}}(25) {{/U}} spread age distribution. If the population grows raidly {{U}}(26) {{/U}} natural increase, i.e., the number of births greatly {{U}}(27) {{/U}} the number of deaths, then as a total population increases the proportion of the workforce {{U}}(28) {{/U}}. Sometimes a population is described as aging, {{U}}(29) {{/U}} means that the birth rate is either falling or growing very slowly, and as people retire {{U}}(30) {{/U}} the workforce there are insufficient numbers of young people entering it to {{U}}(31) {{/U}} those who are leaving it. The population is top heavy with older people. So the {{U}}(32) {{/U}} of the population in the workforce declines when there is {{U}}(33) {{/U}} a rapid increase in births or a falling birth rate. The age distribution of the population has several important effects on the economy. If the population is aging and there is an increase in the number of people retiring {{U}}(34) {{/U}} a corresponding increase in the number entering the workforce, this raises the problem of the ability of the economy to provide a {{U}}(35) {{/U}} level of social services to the retired group. If the {{U}}(36) {{/U}} are to be cared {{U}}(37) {{/U}} in special homes or hotels, finance must be {{U}}(38) {{/U}} for that purpose. If the size of the workforce is small relative {{U}}(39) {{/U}} the total population, then the government tax receipts are relatively low and either the government has less money available to it or the workforce members have to be {{U}}(40) {{/U}} more heavily.

单选题Whenabonebendsbutdoesnotbreak,itiscalled______.A.ahairlinefractureB.acomminutedfractureC.abowingfractureD.anopenfracture

单选题Plastics are materials which are softened by heat and set into lasting form when shaped in a mold. Some are natural; some are semi synthetics as the result of chemical action on a natural substance; some are synthetic, built up from the constituents of oil or coal. All are based on the chemistry of carbon, with its capacity for forming chains. The molecules that compose them (monomers) link together in the setting or curing process to form chains (polymers), which give plastics their flexible strength. Some plastics retain their ability to be softened and reshaped; like wax, they are thermoplastic. Others set permanently in the shapes they are given by heat and pressure; like eggs, they are thermosetting. From industrial beginnings in the 19th century, plastics have struggled through a 120 years of glory, failure, disrepute and suspicion on the slow road to public acceptance. Now, at last, one can positively say that plastics are appreciated and enjoyed for what they are; that they make modern life richer, more comfortable and convenient and also more funny. Plastics are warm materials, sympathetic to the human touch and their transformation into things that come into contact with human beings is entirely appropriate. The fact that there are plastics antiques comes as a shock to most people. How can a material that seems so essential in the 20th century, and one that is so much associated with cheap disposable products, have a history at all? It is a young technology, and a great pan of the fun of collecting plastics is that beautiful pieces of historical interest can still be found very cheaply.

单选题Whataretheygoingtodo?A.Theyaregoingshopping.B.Theyaregoingtoeatout.C.Theyaregoingtohaveawalk.

单选题Questions 17-20 are based on a report about generation gap. You now have 20 seconds to read Questions 17-20.

单选题In the last sentence of the passage, the word "confinement" is closest in meaning to the word" ______ ".

单选题I know something about Kunming. I ______ there many times. [A] have gone [B] have been [C] went

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单选题What is the main point the author makes in the passage?

单选题Besides climate change, developing countries like China need to deal with energy 1 and environmental issues: the development of sources of clean energy needs to be 2 line with their interests. Clean energy has been given greater prominence than ever before; it is seen as a new industrial 3 and 4 of economic growth for the new century. The time for clean energy has come. In China, clean energy is moving ahead at full speed. Take wind power as an example: by the end of last year, China had 5 wind power generating capacity of 12.21 GW, making China the largest wind power generator in Asia and first in the world. But according to the research, one-third of wind power capacity is running 6 due to an inability to get the power to the national 7 . India-like China—relies 8 on coal for its energy needs. This will only change if the funds and technology to develop clean energy, such as wind and nuclear power, are 9 . India will not choose clean energy 10 , Nuclear power is currently the most 11 of clean energy sources. 12 , if it is to be 13 on a large scale by developing nations, technological advances will be needed to make it competitive with coal. Compared 14 developed countries, developing countries have more 15 choices when it comes to energy structure. Promoting economic growth requires 16 energy—and coal, the cheapest and most 17 source of energy for many countries—is the 18 choice. Cheap coal means cheap electricity and a competitive economy. Rising electricity prices would cause public 19 and impact on standards of 20 .

单选题According to the article, communication problems arise when

单选题 Questions 11～13 are boxed on a piece of news about college admission in the USA. Yon now have 15 seconds to read Questions 11～13.

单选题Before the sales start, I make a list of ______ my kids will need for the coming season. A. where B. which C. what D. how

单选题Need a tablet that can handle the demands of family life? Astak aims to please with the Neos tablet-top, a versatile, albeit pricey, device that can sit upright at an easy-to-view angle on a kitchen counter and even withstand the inevitable spilled drink. The tablet"s 5-megapixel camera can be tilted, allowing you to snap photos and record videos at different angles. Its two 5-watt speakers are powerful enough to share a favorite song with your family while its 15.6-inch touch-screen display with a resolution of 1,366 by 768 pixels can be set up for a two-player game. Powered by the Android 4.11 Jelly Bean operating system, the tablet includes Wi-Fi connectivity, Bluetooth technology, a USB port and a SD/MMC card reader. It costs about ＄500. You can keep track of the temperature of the steak you threw on the grill with the iGrillmini Bluetooth smart meat thermometer. Compact enough to hold in one hand, the thermometer has a magnetic mount so you can easily attach it to the side of a grill or a smoker. Using the included apps and probe, the thermometer can send updates to an iPhone or iPad via a wireless Bluetooth signal that automatically connects to your device when it"s within a 150-foot range. It also has a LED display that provides updates on the food"s doneness. The iDevices thermometer is set to ship in mid-December for about ＄40. The Portable Charging Folio Mini can keep your tablet and other gadgets charged up and ready to go. The folio case includes a built-in USB charging hub with four ports and an AC adapter with a 4-foot cable. Side snaps provide easy access to ports and cables and an elastic bungee system helps keep cables organized. Available in gray or black with a marbled felt fabric, the folio case from AViiQ costs about ＄ 80. Need even more juice? The company also makes a Portable Charging Folio with battery for ＄150. An origami-like folding cover lets you position the iPad Air to suit your viewing needs: portrait mode for reading a book and landscape mode for watching a video. When the iPad is in transit, a soft microfiber cover shields its display while a polycarbonate casing protects it from scratches and shocks. The case also has built-in magnets that support the iPad"s auto-wake and sleep features. Priced at ＄60, Moshi"s VersaCover iPad Air Stand Case with Origami Cover is available in green, blue, pink and gray.

单选题This passage is mainly______.