--- I’m sure Andrew will win the first prize in the final. --- I think so. He ___________ for it for months.
It suddenly occurred to him __________ he had left his keys in the office.
—Do you think their table tennis team will win the first place at the coming Asian Games?—__________. Ours is much stronger than theirs.
The death rate is __________ pigs and recovery usually __________ within 7—10 days.
__________ is certain is __________ prevention is more important than treatment.
I asked him __________ we had to go. He told me just two more miles.