He wrote a letter ______ he explained what had happened in the accident.
| A．what | B．which | C．where | D．how |
It is important that we _____ wild animals.
| A．will protect | B．should protect | C．shall protect | D．are protecting |
The teacher demanded that the exam _____ before eleven.
| A．must finish | B．would be finished | C．be finished | D．must be finished |
— I think I’m going to die.
— , Joe. You only have a cold.
| A．Don’t mention it | B．Take it easy | C．It’s hard to say | D．Take care |
There was a(n)________silence in the live interview，when no one knew what to say to the audience.
| A．ashamed | B．disappointed | C．awkward | D．desperate |
--Time and tide wait for no man.
---________. We should value our time.
| A．Absolutely right | B．I can’t agree with you | C．Nonsense | D．Certainly not |