来做做题吧

1. Mr. And Mrs. Burns feel more comfortable on a ship than they would do if they _____.
A. travel B. are traveling C. traveled D. have traveled
答案选C，为什么？

2. If you _____ be in time for the early bus, be sure to get up before 5 o’clock in the morning.
A. are to B. are about to C. are going to D. are due to
答案选A，为什么？

3. --- Have you persuaded him?
--- Yes. After some hours of discussion, I _____ to reason him in accepting the new plan.
A. had managed B. would manage C. have managed D. managed

答案选D，为什么？

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