单选题Paul Samuelson revolutionized __________ by presenting his students with the most advanced economic thinking at an introductory level.
单选题 The sun rises in the east and sets in the west, so it seems as if the sun ______ round the earth.
单选题 Though ______ rich, she was better off than at any other period in her life.
单选题For the first time in this century also, many people are able to enjoy their leisure to the full, ______ trips to the country or seaside at weekends, instead of being confined to their neighborhood. A. making B. to make C. made D. having made
单选题The environment affects the way people interact. To examine this conclusion, two researchers decorated three rooms. One room was refurnished to look ugly. The second room was intended to look average.
单选题______to the war, the United States was an English colony.
单选题Froma10th-centurybook,wecanlearnthat___________.
单选题— _____can you get to the airport?— _____can you get to the airport?— In one and a half hours.
单选题The advocates of realist international relations tend to think that
单选题 Questions17-19 are based on the recording you have just heard.
单选题 The employers prepared, with all due ______, for a conference with the Trade Unions.
单选题 If you are catching a train, it is always ______ better to be early even a fraction of a minute than too late.
单选题The main purpose of the fifth generation computer effort is ______. A．to use molecules instead of electronic elements B．to express logical symbols in the way of chemical units of DNA C．to obtain true artificial intelligence D．to take the place of human thoughts
单选题When confronted with such questions, my mind goes______, and I can hardly remember my own date of birth.
单选题It was ______ the worst food I have ever had.
单选题At her first U.S. Open, Evert was a ______.
单选题The incomplete sentence of "So far so good" (Paragraph 10) can probably be used to mean ______.
单选题It has long been known that total sleep ______is 100 percent fatal to rats, yet, upon examination of the dead bodies, the animals look completely normal.
单选题The authorities are discouraging new ______ who want to enter the country as there aren't enough jobs for them.
单选题I ______ half an hour before she came out of the telephone box and I entered. A) waited B) have waited C) had been waiting D) was waiting