Question

--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

Answer 1

C 

試題分析：句意：--為什么這個湖這么難聞？--因為很多水已經(jīng)被污染了。a large amount of+不可數(shù)名詞做主語的時候，謂語是單數(shù)，如果是large amounts of+不可數(shù)名詞做主語的時候，謂語是復數(shù)，所以排除AD，而且從Why does the lake smell terrible?可知這個湖已經(jīng)被污染了，所以選C。