______ the theory, the scientists asked more than sixty college students to take
题型：同步题难度：来源：
| ______ the theory, the scientists asked more than sixty college students to take part in the experiment. |
| [ ] |
A. Being tested
B. To test
C. Testing
D. Tested |
答案
| B |
举一反三
| Mr Huang told us to spend as much time as possible ________ our English studies. |
| [ ] |
A. to improve
B. improved
C. improving
D. on improving |
| In the morning you can get up only ________ all your equipment buried and you"ve got to dig it out. |
| [ ] |
A. to be found
B. found
C. to find
D. finding |
| Some people try to knock me down, only ________ me more determined to do better. |
| [ ] |
A. to make
B. makes
C. having made
D. made |
| It was ________ the old watch that the old man spent the whole afternoon at home. |
| [ ] |
A. in repair
B. repaired
C. to repair
D. repairing |
| To their surprise, they found the lecture given by the famous professor easy ______. |
| [ ] |
A. to be understood
B. to understand
C. understanding
D. understood |
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