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6.For the sake of students'health,outdoor activities ______ in some areas late last year because of the smog pollution.(  )
A.do not allowB.did not allow
C.were not allowedD.are not allowed

分析 为了学生的健康,因为雾霾的污染,去年一些地区不允许开展户外活动.

解答 答案C.
根据句子中的时间状语"last year"可知,是过去的时间状语,动作应该发生在过去,固定短语"be allowed to do sth  被允许做某事",因此应该用一般过去时的被动语态.故选C.

点评 本题考查时态辨析.解答此类题目首先要读懂句意,捕捉信息,理解情境,综合运用,灵活答题,结合具体的语境,选出正确的时态.在平时学习的过程中,对每一种时态的用法要掌握到位.

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