It was soup _________ Oliver was eating.

When_________why he was late, he made no answer.

Even if there is no scientific proof        secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.

It is only when you nearly lose someone _____ fully conscious of how much you value him.

John thinks it won’t be long _________ he is ready for his new job.

He must have known the truth yesterday, _________?

_____ to make a speech, he said he would be glad to.

I can’t remember _______ you started doing the work.

If _____ without following the doctor’s instructions, the medicine may have serious side effects.

Not until the early years of the 19^th century ________ what heat was.