Question

--Why does the lake smell terrible?

--Because large quantities of water _______.

A. have polluted B. is being polluted

C. has been polluted D. have been polluted

Answer 1

D

【解析】

試題分析：考查時(shí)態(tài)、語(yǔ)態(tài)和主謂一致。句意：湖里的水為什么如此難聞？--因?yàn)榇罅康乃�被污染了。根�?jù)第一句可知，湖水已經(jīng)被污染了，應(yīng)該用現(xiàn)在完成時(shí)表示對(duì)現(xiàn)在造成的影響(湖水變質(zhì))，排除B；water與pollute是動(dòng)賓關(guān)系，即水被污染，應(yīng)該用被動(dòng)語(yǔ)態(tài)，綜合考慮，應(yīng)該使用現(xiàn)在完成時(shí)的被動(dòng)形式，即have/has been dine，排除A；a large quantity of和large quantities of既可修飾可數(shù)名詞，也可修飾不可數(shù)名詞；large quantities of+名詞作主語(yǔ)，不管名詞是否可數(shù)，謂語(yǔ)都用復(fù)數(shù)，排除C，故選D。

考點(diǎn)：考查時(shí)態(tài)、語(yǔ)態(tài)和主謂一致