Only after spending several nights working on the math problem to wonder whether the problem was wrongly set.
A. had he begun B. he began C. did he begin D. began he
I can’t persuade him out of playing computer games. He is to them.
A. reminded B. accustomed C. addicted D. stuck
______ by a greater demand of vegetables, farmers have built more green houses.
A. Driven B. Being driven C. To drive D. Having driven
It is reported that the floods have left about _________ people homeless.
A. two thousand B. two-thousands C. two thousands D. two thousands of
When you get the paper back, pay special attention to what ________.
A. have marked B. have been marked C. had marked D. had been marked
Students should be encouraged to use ________ Internet as ________ resource.
A. 不填; a B. the; a C. the; the D. 不填; the
