It was soup _________ Oliver was eating.
| A．that | B．what | C．which | D．when |
When_________why he was late, he made no answer.
| A．questioned | B．questioning |
| C．asking questions | D．question |
Even if there is no scientific proof secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.
| A．which | B．that | C．when | D．where |
It is only when you nearly lose someone _____ fully conscious of how much you value him.
| A．do you become | B．then you become |
| C．have you become | D．that you become |
John thinks it won’t be long _________ he is ready for his new job.
| A．when | B．after | C．before | D．since |
He must have known the truth yesterday, _________?
| A．haven’t you | B．didn’t you | C．have you | D．did you |
_____ to make a speech, he said he would be glad to.
| A．When asked | B．When asking |
| C．When he was asking | D．When to ask |
I can’t remember _______ you started doing the work.
| A．that it was when | B．when it was that |
| C．when was it that | D．that was it when |
If _____ without following the doctor’s instructions, the medicine may have serious side effects.
| A．Taken | B．to be taken | C．Taking | D．being taken |
Not until the early years of the 19th century ________ what heat was.
| A．man did know | B．did man knew |
| C．didn't man know | D．did man know |