当你称呼李老师（男）时，应如何称呼？________.
| A．Teacher Li | B．Mr. Li | C．Miss Li | D．Sir Li |
I stopped the car ____ a short break as I was feeling tired.
| A．take | B．taking | C．taken | D．to take |
______ the students were when they heard the rock music!
| A．How excited | B．How exciting |
| C．What excited | D．What exciting |
______ you keep trying till the end, you will never know how strong you are!
| A．Although | B．If |
| C．Unless | D．Because |
---Look! The light is still on. Is Mr Wu working in his office？
---No, it _____ be Mr Wu. He has gone to Nanjing for a meeting.
| A．needn’t | B．mustn’t |
| C．can’t | D．wouldn’t |
The fire lasted half an hour before it was ______ by the firemen.
| A．put out | B．blown out |
| C．taken out | D．cut out |