1. The problem ________ when the students refused to do their homework. A. arose B. aroused C. rose D. raised 2. When he suddenly ________ up the subject of genetic engineering, there was an embarrassed silence. A. took B. brought C. showed D. came 3. ________ so many people in the United States been out of work as today. A. More than ever before B. In the past, there have never C. Never before have D. Formerly, there never were 4. It ________ as a shock to realize that I was not alone in the room. A. came B. appeared C. arrived D. reached 5. Since William had been seriously ill for several months, his parents were worried about ________ to return to school full-time. A. he wanted B. he wanting C. him to want D. his wanting 6. The association is ________ to raising funds to help the blind. A. conducted B. committed C. concentrated D. concerned 7. I won't ________ those children making a noise in my house! A. allow B. let C. have D. permit 8. The TV station, in ________ to massive popular demand, decided to continue the soap opera (肥皂剧). A. regard B. relation C. respect D. response 9. The opposition leaders ________ the government for not taking action sooner. A. warned B. criticized C. threatened D. urged 10. In some schools children who prefer to read books rather than ________ football become social outcasts (被抛弃者). A. play B. playing C. to play D. to playing 11. Others argue that since the earth has endured a long string of ice ages in the last two million to three million years, any warming is ________ to be temporary. A. seemed B. likely C. tended D. possible 12. ________ the concert had begun did we realize what a splendid show it was going to be. ...
