填空题

You must keep this door (close) ______ at all times when the red light is on.

【参考答案】

closed
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Where do a lot of the world resources come fromThey come from these ______ countries.
单项选择题
A．She went to the airport.B．She was busy on her assignment.C．She went to watch a movie.D．She went to see her friend.
A．She went to the airport.
B．She was busy on her assignment.
C．She went to watch a movie.
D．She went to see her friend.
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