--Why does the lake smell terrible?

-- Because a large amount of water_______.

A. have polluted B. is being polluted

C. has been polluted D. have been polluted

 

C

【解析】

試題分析：句意：--為什么這個(gè)湖這么難聞？--因?yàn)楹芏嗨呀?jīng)被污染了。a large amount of+不可數(shù)名詞做主語的時(shí)候，謂語是單數(shù)，如果是large amounts of+不可數(shù)名詞做主語的時(shí)候，謂語是復(fù)數(shù)，所以排除AD，而且從Why does the lake smell terrible?可知這個(gè)湖已經(jīng)被污染了，所以選C。

考點(diǎn)：考查時(shí)態(tài)語態(tài)和主謂一致

 

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