We ____ last night, but we went to the concert instead.
A must have studied B might study
C should have studied D would study
–Would you permit me ______here?
- Sorry, we don’t permit _____ here in the reading room.
| A．smoking; smoking | B．to smoke; to smoke |
| C．smoking; to smoke | D．to smoke; smoking |
I remember the whole thing _____ it happened yesterday.
| A．as | B．as if | C．even if | D．that |
Our experiment had got into _____trouble, so we decided to take _____ chance and add more water, and luckily, we succeeded.
| A．/ ; / | B．/ ; a | C．the; a | D．a; a |
–Would you mind us asking you a few questions?
–_______.
| A．Yes. Go ahead. | B．Not at all. You’d better not. |
| C．Not at all. Go ahead | D．No. I don’t mind. |
—Mother, can I turn on TV and watch the news?
—Of course, __________.
| A．go ahead | B．go on | C．go out | D．go forward |