单项选择题

A．The usher.
B．The people sitting next.
C．The people sitting in front of him.
D．The people standing in the back.
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单项选择题
The passage gives a general description of the benefits and potential problems of a hydrogen economy.
A．Y
B．N
C．NG
单项选择题
A．He didn’’t really enjoy it very much.B．He liked its story, but the music was awful.C．He enjoyed every minute of the movie.D．He was excited with the development of the story.
A．He didn’’t really enjoy it very much.
B．He liked its story, but the music was awful.
C．He enjoyed every minute of the movie.
D．He was excited with the development of the story.
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