单项选择题

A．The weather yesterday.
B．A polluted river.
C．Hotel accommodations.
D．The quality of the air.
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单项选择题
A．Drawing graphs.B．Giving presentations.C．Having a class discussion.D．Taking an examination.
A．Drawing graphs.
B．Giving presentations.
C．Having a class discussion.
D．Taking an examination.
单项选择题
A．Mary will call off the appointment with Mrs. David.B．They will go to a movie instead because they haven’t got tickets for the football game.C．They will have dinner after the movie.D．They put it off until Saturday.
A．Mary will call off the appointment with Mrs. David.
B．They will go to a movie instead because they haven’t got tickets for the football game.
C．They will have dinner after the movie.
D．They put it off until Saturday.
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