— Could we practice playing the guitar in the hall, Sir ?
—No , ___________ you have the principal’s (校长) note.
| A．if | B．unless | C．because | D．since |
—I’m always afraid of giving a speech in front of the class.
—____ You can do it well.
| A．I’m sorry to hear that. |
| B．Take it easy. |
| C．You are too nervous. |
| D．Good luck. |
The man refused to say sorry to me, ____ it was his mistakes(错误).
| A．because | B．when | C．after | D．even though |
He feels lonely because he has no close friends ____.
| A．to talk | B．to talk with |
| C．talking | D．talking with |
If you are ____ trouble, please call me ____ 72335611.
| A．in; in | B．at; at | C．at; in | D．in; at |
When the teacher asks him, he always ____.
| A．keep silent | B．keep silently |
| C．keeps silent | D．keeps silenty |