---- Why does the river smell terrible?

---- Because large quantities of water______．

A. have been polluted          B. has polluted C. has been polluted             D. have polluted

 

A

【解析】

試題分析： 考查動詞的時態(tài)與語態(tài)。句意 為什么這條河流的味道那么難聞？因為大量的水被污染掉了。Large quantities of +名詞 做主語是謂語動詞用復(fù)數(shù)形式，水與污染之間是被動關(guān)系，結(jié)合以上兩點，故選A項。

考點 : 考查動詞的時態(tài)與語態(tài)

 

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