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 為了學(xué)生的健康，因?yàn)殪F霾的污染，去年一些地區(qū)不允許開(kāi)展戶外活動(dòng)．

解答 答案C．
根據(jù)句子中的時(shí)間狀語(yǔ)"last year"可知，是過(guò)去的時(shí)間狀語(yǔ)，動(dòng)作應(yīng)該發(fā)生在過(guò)去，固定短語(yǔ)"be allowed to do sth  被允許做某事"，因此應(yīng)該用一般過(guò)去時(shí)的被動(dòng)語(yǔ)態(tài)．故選C．

點(diǎn)評(píng) 本題考查時(shí)態(tài)辨析．解答此類題目首先要讀懂句意，捕捉信息，理解情境，綜合運(yùn)用，靈活答題，結(jié)合具體的語(yǔ)境，選出正確的時(shí)態(tài)．在平時(shí)學(xué)習(xí)的過(guò)程中，對(duì)每一種時(shí)態(tài)的用法要掌握到位．

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