单选题I can"t ______ books like those—they just make me sleepy.

单选题They promised to look ______ the case as soon as they got there.

单选题The mayor made a/an ______ visit to the scene of the fighting last Friday. A. separate B. individual C. civil D. personal

单选题Consumers should do more than simply complain about the poor quality of goods.

单选题I don"t regret ______ her what I thought about her proposal, even if it upset her.

单选题Nobody can do a good job in computer programming ______ he or she has a good command of English.

单选题It does not ______ whether it rains or not.

单选题It seems that there is no resolution to this racial ______.

单选题Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consumption of energy, increased demand of raw materials, accelerated flow of materials through the economy and increased quantities of metals and other substances in use each person. The history of industrial development abounds with examples. In 1870, horses and mules were the prime source of power on U.S. farms. One horse or mule was required to support four human beings—a ratio that remained almost constant for many decades. At that time, had a national commission been asked to forecast the population for 1970, its answer probably would have depended on whether its consultants were of an economic or technological turn of mind. Had they been "economists", they would probably have projected the 1970 horse or mule population to be more than 50 million. Had they been "technologists", they would have recognized that the power of steam had already been harnessed to industry and to land and ocean transport. They would have recognized further that it would be the prime source of power on the farm. It would have been difficult for them to avoid the conclusion that the horse and mule population would decline rapidly.

单选题Helen ______ painting for a while, but soon lost interest.

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单选题Some ______ like pop music; others don"t.

单选题When confronted with such an urgency, my mind goes ______, and I can hardly remember my own date of birth.

单选题We cannot choose whether we will pay income tax or not, because payment of income tax is ______.

单选题These overseas students show great ______ for learning a new language.

单选题The whole nation was stirred when news came that China"s first spaceship had been successfully launched．

单选题Football players are ______ males, though there are some females.

单选题I can"t find my notebook. I ______ it in the reading room.

单选题The situation described in the report ______ terrible, but it may not happen.

单选题She ______ away the tears on her face when she heard someone walking into the room.