题目内容
2.The water in the river nearby will be dirtier than before if nothing __________.( )| A. | has done | B. | will be done | C. | is done | D. | was done |
分析 如果什么措施也不采取的话,附近河里的水将会比以前更脏.
解答 答案:C
根据if nothing __________.可知if如果,引导条件状语从句,从句中用一般现在时表示将来;并且从句中的主语nothing是动作的承受者,和动词do之间构成被动的关系,应该用被动语态,一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.主语nothing,所以应该是is done,故选:C.
点评 主要考查被动语态,当句子的主语是动作的承受者时,应该用被动语态,本题考查的是一般现在时态的被动语态.一定注意其构成形式,一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.
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