单选题The cake is delicious, John. Would you like to have ______ more?

单选题Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are 1 to go there in the next decade may find plenty 2 water to slake (消除) their thirst. And with water present the 3 of finding some sort of life on Mars are 4 brighter. This is the view of 40 5 all over the world who have been analyzing 6 of pictures and other scientific 7 obtained by robot explorers in the sixties and seventies. To begin with scientists thought the Red Planet was as 8 as the Moon with dust storms swirling over vast sandy 9 . But now the picture is very different with mountains and valleys carved by 10 glaciers and torrential rivers rushing and rumbling deep underground. In a report on the 11 of the Martian pictures Dr. Michael Car of the US Geological Survey comments: "I am 12 there"s lots of water on Mars." Any surface water will be in the 13 of ice. But it could save explorers 14 to take so much fresh 15 with them. The report says 16 Mars probably had a warmer climate in ages 17 due to its axis having been more steeply tilted towards the Sun. 18 convincing signs of plant or animal life have been 19 by instruments soft landed on Mars, 20 only the immediate vicinity (靠近) of landing vehicles could be examined.

单选题______ the weather has improved, we'll be able to enjoy watching the tennis game. A. Providing that B. Now that C. So that D. Considered that

单选题Since he joined the troops, Tom ______ to do a good deed every day.

单选题Professor Wang, ______ for his information lectures, was warmly received by his students.

单选题China has got a good ______ for fighting against the flu with its careful and smooth organization.

单选题Was it a famous film star______ he met a week ago?

单选题Trying to ______ wild life is a job that concerns all of us.

单选题I hate ______ when I am reading a newspaper or a book. A. to disturb B. disturbed C. being disturbed D. disturbing

单选题If you invest so heavily in the stock market, you"re ______ risks.

单选题To be flank, I am more annoyed than disappointed.

单选题I don"t think Jill would be a good teacher. She"s got. ______ patience with children.

单选题You will miss the bus ______ you hurry up.

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单选题"That"s a beautiful dress you gave my daughter for her birthday. " "I hope it"s ______ for her; if not, you can exchange it. "

单选题How to Operate a Copier It is not difficult to operate a copier. Follow the steps below, you will know how to use it properly: Step 1 Put the plug of copier in a socket (插座). The power light should come on. Check the paper tray to ensure that there"s enough paper in it. If more paper is needed, put additional paper in the paper tray. Step 2 Lift the lid of the copier and place the document that you want to copy face down. Use the measurement guide to position the document appropriately. Step 3 Place the lid of the copier slowly down to hold the document in place. Choose the number of copies that you want. Step 4 Choose what color you want the copies to be. Some copies may come out darker than normal. Use the buttons on the top of the copier, to adjust the darkness to your desired shade. Step 5 Decide how you want the document to be copied. You can have copies on both sides of the paper or only on one side. Other features may be available on different types of photocopiers. Step 6 Press the "Start" or "Copy" button, which is located on the top of most copiers. The document will be copied, and the duplicate copies will be deposited into a tray.

单选题Dark blue is the best colour ______ me.

单选题Lum asked Wong if he ______. harvesting his rice.

单选题At the World Cup, the German team tried their best to avoid

单选题Generally speaking, the application—or misapplication—of knowledge obtained from stem cell research may influence our current moral concepts.