4、My wallet is nowhere to be found. I ___ when I was on the bus. A. must have dropped it B. must drop it C. should have dropped it D. ought to have dropped it 5、"She must be in the dormitory now." "No, she ___ be there. I saw her in the classroom...
9. Good night, sleep tight, sweet dreams. 晚安,睡个好觉,做个好梦。 10. I want to stay in bed for another half an hour. 我真想在床上多睡半个小时。 11. Let me sleep on for ten minutes. 让我再睡10分钟。 12. Did the alarm go off? 闹钟响了吗?
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