单选题Before the final examination, the teacher told the student: "Two hours ______ the limit of the test." A. are B. has been C. would be D. is

单选题The new presidential home was painted white to ______.

单选题On the beach she could hardly ______ him from the other swimmers. A. figure B. tell C. recognize D. know

单选题Those long skirts are now out of______. A) mood B ) order C ) fashion D) form

单选题He has two Chinese English dictionaries, were bought last week.A) two of whichB) both of whichC) both of themD) all of them

单选题I don’t think she’ll be upset，but I'll see her in case she is．A) 我不认为她会不安，但我还是去看看她，以免她不安。B) 我认为她不会不安，但万一她不安，我会去看她的。C) 我认为她不会不安，但以防万一，我还是去看她一下。D) 虽然我认为她不会不安，但我还是要去看看她，以免她不安。

单选题He'll never succeed in passing the CET-4, ______ hard he tries.

单选题______ with the developed countries, some African countries are left far behind in terms of people's living standard. A. Compared B. Compare C. To compare D. Comparing

单选题He didn't realize the importance of extensive reading until he graduated from high school.A) 他一直到高中毕业才认识到广泛阅读的重要性。B) 他从高中毕业时就认识到广泛阅读的重要性。C) 读高中时他没有认识到广泛阅读的重要性。D) 他高中都没有毕业就意识到了广泛阅读的重要性。

单选题______, they would certainly come and help us.

单选题The speaker, ______ for her splendid speeches, was warmly received by the audience.

单选题Economic development should go hand in hand with environmental protection.

单选题We are glad to welcome our Chinese friends to this special Business Training program. Here, you will have a variety of activities and a chance to exchange ideas with each other. We hope that all of you will benefit a lot from this program. During your stay, please do not hesitate to speak to us with questions or concerns. We believe this will be an educational and enjoyable program.

单选题Mr. Nott is far too wise a man not ______ that.A) seeB) seeingC) to seeD) being seen

单选题I was wondering whether you could spare me ten minutes during your lunch break tomorrow.

单选题An engineer is needed by the company to manage the work of installation teams, and to provide engineering assistance when problems occur.

单选题{{B}}Passage 1{{/B}} In medicine, blood type is the classification of red blood cells by the presence of specific substances on their surface. In the early part of the 20th century, physicians discovered that blood transfusions often failed because the blood type of the recipient was not compatible with that of the donor. In 1901 the Austrian doctor Karl Landsteiner classified blood types and discovered that the hereditary blood factor is of great importance in blood transfusions because it creates reactions that can threaten the life of newborn infants. The four blood types are known as A, B, AB, and O. Blood type A contains red blood cells that have a substance A on their surface. This type of blood also contains an antibody directed against substance B, which can be found on the red cells of persons with blood type B. Type B blood contains the opposite things. Blood type AB contains neither antibody, but red cells in this type of blood contain both A and B substances. In type O blood, neither substance is present on the red cells, but the individual is capable of forming antibodies directed against red cells containing substance A or B, If blood type A is transfused into a person with B type blood, anti-A antibodies in the recipient will destroy the transfused A red cells. Because O type blood has neither substance on its red cells, it can be given successfully to almost any person. Persons with blood type AB have no antibodies and can receive any of the four types of blood; thus blood types O and AB are called universal donors and universal recipients, respectively. Other hereditary(遗传的) blood-group systems have subsequently been discovered, for example, the Rh blood factor. And nowadays more than twenty additional blood types have been discovered. Their importance is obvious.

单选题The output value in the first season was ten percent over the same period Of last year．A．第一季度的产品售价是去年同期的百分之十。B．第一季度生产出来的价值比去年同期增长了百分之十。C．第一季度产值比去年同期高百分之十。D．第一季度的产值是去年同期的百分之十。

单选题While admitting that the forecast was ______ uncertain, the scientists warned against treating it as a cry of wolf. A．somewhere B．anyhow C．somewhat D．anyway

单选题Which of the following is NOT shown as the factor for causing exercise injuries?