题目内容
6．For the sake of students'health，outdoor activities ______ in some areas late last year because of the smog pollution．（ ）| A． | do not allow | B． | did not allow | ||
| C． | were not allowed | D． | 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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