—It’s reported that the new underground line has been completed．
—Yes but it hasn’t been made clear _____it’s to be opened to traffic．
| A．that | B．who | C．what | D．when |
She refused to _____ the door key to the landlady until she got back her deposit.
| A．hand in | B．hand out | C．hand down | D．hand over |
_____ I sympathize, I can’t really do very much to help them out of the difficulties.
| A．As long as | B．As | C．While | D．Even |
For some time now, world leaders _____ out the necessity for agreement on arms reduction.
| A．had been pointing | B．were pointing | C．have been pointing | D．pointed |
Have you ever been in a situation _____ you know the other person is right yet you cannot agree with him?
| A．by which | B．that | C．in where | D．where |
You _____ Jim anything about it. It was none of his business.
| A．needn’t have told | B．needn’t tell | C．mustn’t have told | D．mustn’t tell |