--Why does the river smell terrible?
--Because large quantities of water__________.
A．have polluted B．is being pollutedC．has been pollutedD．have been polluted
Ｄ
考察主謂一致。large quantities of 放在句首，謂語動(dòng)詞永遠(yuǎn)都使用復(fù)數(shù)形式，根據(jù)句意可知是被動(dòng)一意思，故D正確。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：單選題

When I said some students were so lazy, I ___to you.
A．don’t referB．wasn’t referringC．didn’t referD．hasn’t referred

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Food supplies in the flood-stricken area ______. We must act immediately before there’s nothing left.
A．have run outB．a(chǎn)re running outC．have been run outD．a(chǎn)re being run out

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The past two years ________ a sharp rise in oil price, which adds to the burden of auto transportation industry.   
A．witnessed B．has witnessed C．is witnessing D．witnesses

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Hardly            Mike picked up the ball when another player took it form him.
A．haveB．hasC．hadD．have been

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

-----Is this the first time you______ Chengdu?
-----No. But the first time I______ here, the city wasn’t so beautiful
A．visited; cameB．visited; have come
C．have visited ; have comeD．have visited; came

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

By the end of last year, another new gymnasium        in Beijing.
A．would be completedB．was being completed
C．has been completedD．had been completed

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Scientists have created GM tomatoes which ______ fresh for 45 days, three times as long as normal tomatoes.
A．a(chǎn)re stayedB．have been stayedC．stayD．stayed

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—I am going to America.
—how long    you    there?
A．a(chǎn)re; stayedB．a(chǎn)re; stayingC．have; stayedD．did; stay

查看答案和解析>>

同步練習(xí)冊(cè)答案