Scientists say it may be five or six years _______ it is possible to test this medicine on human patients.
| A．since | B．after |
| C．before | D．when |
He looked quite healthy though he was ____.
| A．in seventy | B．in his seventies |
| C．at seventies | D．age of seventy |
If you can ____ a second, I’ll look for Bob and tell him you are on the phone for him.
| A．depend on | B．hang on |
| C．come back | D．take along |
It has been ten years since the Labour Party came into ____ in that country.
| A．control | B．force | C．power | D．charge |
— ____ that you came here yesterday?
— By train.
| A．How it was | B．How was it |
| C．How were you | D．How are you |
He came home after midnight, and ____, he was drunk. That made his parents very angry.
| A．What is more | B．On the other hand |
| C．In my opinion | D．In another word |