题目内容
13．More and more trees_________in Beijing every year．（ ）| A． | plant | B． | planted | C． | are planted | D． | were planted |
分析 北京每年都会栽种越来越多的树．
解答 答案：C．
首先根据时间状语 every year，判断句中的谓语动词是经常性反复性的动作，所以用一般现在时，主语More and more trees 是动作plant 的承受者，所以用被动语态，一般现在时被动语态的构成是：主语+am/is/are+动词的过去分词，故选C．
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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