The trees last month．( )A．are plantedB．were plantedC．plantedD．plant 题目和参考答案——青夏教育精英家教网—

题目内容

19．The trees ______ last month．（　　）

A．

are planted

B．

were planted

C．

planted

D．

plant

分析那些树是上个月栽下的．

解答答案：B．
根据语境推测句意是"那些树是上个月栽下的．"句子表述的是过去的事情，判断句子中的谓语动词用一般过去时，主语The trees 是动作plant的承受者，所以用被动语态，一般过去时被动语态的构成是：主语+was/were+动词的过去分词，故选B．

点评本题考查时态和语态．每个时态都有标志词，熟记这些标志词是做题的关键．在没有时间状语的情况下可以根据语境来对时态做出判断．判断语态的关键则是观察主语是谓语动词的执行者还是承受者．

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