填空题

The emission-trading program would encourage factories ______.

【参考答案】

cut their emissions below the limits。
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单项选择题
A．Today’s seminar was informative.B．Another seminar will take place the following week.C．Next week’s seminar is on a different topic.D．There will be two seminars next week.
A．Today’s seminar was informative.
B．Another seminar will take place the following week.
C．Next week’s seminar is on a different topic.
D．There will be two seminars next week.
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