He must have been ill, or he ________ to the lecture then.
| A．would come | B．would have come |
| C．came | D．had come |
Listen! His family must be quarrelling, ____?
| A．mustn’t it | B．isn’t it |
| C．aren’t they | D．needn’t they |
The engineers made two big plans for the dam, ____ was never put in force.
| A．one of them | B．which |
| C．one of which | D．every one of which |
—What do you think of the concert?
—I really enjoy it. I didn’t expect it was ____ wonderful.
| A．as | B．more | C．most | D．very |
—Tom, you are caught late again.
—Oh, ____.
| A．not at all | B．just my luck |
| C．never mind | D．that’s all right |
—We must thank you for taking the trouble to cook us a meal.
—____.
| A．With pleasure | B．It doesn’t matter |
| C．It was no trouble at all | D．By all means |