8.??It is not easy ____ the answer to the difficult math problem. A. to figure out B. figuring out C. figure out D. being figured out ...

2.??I ____ asleep in the corner, for I remember nothing of what happened during the night. A. might fall B. must fall C. must have fallen D. can have fallen ...

19.??But for water, people ____ not live on the earth. A. can B. will be able to C. make D. could ...

11.??To make up an objective test, the teacher writes a series of questions, ____has only one correct answer. A. some of which B. each of which C. which D. that ...

5.??His carelessness ____ her failure in the exams. A. resulted from B. resulted C. resulted in D. resulted to ...

25.??It is recommended that the project ____ until all the preparations have been made. A. not be started B. will not be started C. is not started D. is not to be started ...

13.??I wish I ____ to study English years ago. A. had started B. started C. could stard D. would start ...

6.??Yhudi Menuhin, who died in Berlin on March 12, 1999, at the age of 82, was a child prodigy who fulfilled his promise to become one of the world's foremost violinists before extending his range to teaching and conducting. The gently sp...

1.??Young people should have the right to control and direct their own learning, that is, to decide what they want to learn, and when, where, how, how much, how fast, and with what help they want to learn it. To be still more specific, I wa...

12.??Copper(铜)was the first metal that man learned to make.In some mountainous lands there were rocks streaked with green minerals.One day some rocks were accidentally heated by a roaring fire.When the fire burned low,little beads of coppe...