—Whydoesthelakesmellterrible?—

—Why does the lake smell terrible?
—Because large quantities of water .

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

登录免费查看答案和解析

相关试题

Do you think the proposed new airport _______ the local residents?

A．will be opposed by	B．will be opposed to
C．has opposed to	D．has opposed by

收藏答案/解析

All of the students are curious about his success in the Olympics. Please tell us _______.

A．in detail

B．in brief

C．in all

D．in turn

收藏答案/解析

The position in that company is still ____ and you can apply for it now.

A．empty

B．vacant

C．blank

D．hollow

收藏答案/解析

To the people’s delight, the _______ official has been sentenced to ten years’ imprisonment.

A．flattery

B．innocent

C．corrupt

D．mistaken

收藏答案/解析

I have decided to _______ my proposal for urban development to the city council.

A．negotiate

B．confirm

C．prove

D．submit

收藏答案/解析