试题详情

It was _____ terrible weather _____ we had to call off the camp.

The least they _____ have done was to call to say they _____ to go.

Many times when he was in terrible pain he had _____ to be allowed to die.

get to the airport in time? ---Yes. We were really lucky. ______ had we got on the plane _____ our

It was _____ the chief engineer came _____ we began the experiment.