I'm sorry to __________ you, but can you tell me how to get to the library?
| A．bother | B．puzzle |
| C．annoy | D．worry |
The big snow caused great _______to the people living in the south of China, ________some of them homeless.
| A．destroy; left | B．damage; leaving |
| C．ruin; having left | D．wound; leaving |
Mr. Smith, ______ in the factory for thirty years, is on the way back to his village.
| A．to work | B．working |
| C．to have worked | D．having worked |
—How was that?
—I was chatting on line _____ the power went out.
| A．because | B．while | C．as | D．when |
Our teacher always speaks slowly and clearly in class _____.
| A．so as to be understood | B．to have understood |
| C．so as to understand | D．to understand |
—Are you satisfied with the answer?
—Not at all. It couldn't have been ______.
| A．worse | B．so bad |
| C．better | D．the worst |