介绍:
这句话英语用得很多： It’s not supposed to ...
-- 不应该
A: You are not supposed to go in there.
B: Why not?
A: They are still mopping the tile. They don’t want anyone to trip.
B: How long will I have to wait?
A: Mary is not supposed to be eating cookie before dinner.
B: I know. She always is full before dinner time.
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