The environment will be further polluted unless some measures _____.


  1. A.
    are taken
  2. B.
    will be taken
  3. C.
    are being taken
  4. D.
    should be taken
A
試題分析:考查時(shí)態(tài):句意:環(huán)境將被進(jìn)一步污染,除非一些措施被采取。主句是一般將來(lái)時(shí),Unless引導(dǎo)的是條件狀語(yǔ)從句,用一般現(xiàn)在時(shí)代替將來(lái)時(shí)。選A。
考點(diǎn):考查時(shí)態(tài)
點(diǎn)評(píng):時(shí)態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時(shí)間狀語(yǔ)。要根據(jù)時(shí)間狀語(yǔ)來(lái)選擇合適的時(shí)態(tài),在平時(shí)的學(xué)習(xí)中要注意積累有關(guān)時(shí)態(tài)的用法和各種時(shí)態(tài)的特殊之處。注意時(shí)間條件狀語(yǔ)從句不能用一般將來(lái)時(shí),應(yīng)該用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)。
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