The man refused to say sorry to me, ____ it was his mistakes.
| 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 |
When the teacher asks him, he always ____.
| A．keep silent | B．keep silently |
| C．keeps silent | D．keeps silently |
Mr. Li makes me ____, because it is bad for my health.
| A．don’t smoke | B．not smoke |
| C．not smoking | D．not to smoke |
Tom didn’t go hiking with his classmates ____ his illness.
| A．because | B．because of | C．as | D．since |