_____ on the subject for half an hour, Liu Ying suddenly stopped. [ ]A. To b
题型：吉林省期中题难度：来源：
| _____ on the subject for half an hour, Liu Ying suddenly stopped. |
| [ ] |
A. To be worked
B. To work
C. Having worked
D. Having been worked |
答案
| C |
举一反三
| She went to the supermarket and _____ what she needed, she returned home, light-hearted. |
A. bought
B. having bought
C. buying
D. to have bought |
| _____ himself with necessary knowledge and skills, the young man went to the job market with much confidence. |
A. Equipped
B. Equipping
C. Having equipped
D. Being equipped |
| Dina, _____ for months to find a job as a waitress, finally took a position at a local advertising agency. |
[ ] |
A. struggling
B. struggled
C. having struggled
D. to struggle |
| _____ different kinds of pianos, the factory is sure they can satisfy people"s needs. |
A. To produce
B. Being produced
C. Produced
D. Having produced |
| _____ the address, Tom sent the email to his teacher. |
A. Having checked
B. Checked
C. Being checked
D. To check |
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