GCT考试英语语法结构练习题：情态动词3
1. You ____ the work. Now you won’t meet the schedule.A should finish B should have finish
C must finish D must have finished
2. He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.
A shouldn’t be B can’t have finished C can’t be D mustn’t have finished
3. The farmer realized that he’d better, if he didn’t want to have a total loss, ____ his crop earlier than usual.
A harvesting B to harvest C harvested D harvest
4. My pain ___ apparent the moment I walked into the room. For the first man O met asked me sympathetically, “Are you all right?”
A must be B had been C must have been D should be
5. They were chatting when I walked into the office.
They ____ then. It’s office hour.
A can’t chat B shouldn’t chat
C mustn’t be chatting D shouldn’t have been chatting
答案：1B 2B 3D 4C 5D
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