________ the problem, he wouldn't have committed those mistakes.
| A．If he understood | B．Had he understood |
| C．When he had understood | D．If he would understood |
I'm not ____ my best tonight. I'd better not have anything for supper. Perhaps you'd_____me some tea.
| A．trying;give | B．doing;offer | C．making;bring | D．feeling; make |
The ____ is that the new machine will arrive tomorrow.
| A．chance | B．luck | C．happening | D．accident |
The employee must have been dismissed by the employer last month, ____ he?
| A．haven't | B．hasn't | C．didn't | D．wasn't |
--- We really enjoyed ourselves at the party. Thanks again, Mr and Mrs Johnson.
---____. Just drop in whenever you feel like it.
| A．With pleasure | B．Our great honor |
| C．Nice to meet you here | D．Nice having met you here |
It's no secret to us, but he alone is in the dark. It means ____.
| A．nobody but him knows the secret |
| B．we all know the secret except him |
| C．it's so dark that he can't see everything clearly |
| D．only the needs to keep the secret |