—Why does the lake smell terrible? —Because large quantities of water _____.
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A
have polluted.
B
is being polluted.
C
has been polluted.
D
have been polluted.
推荐题目
I still remember_____ to visit the Mountain Tai when I was young and I am longing to visit it again.
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A
to take
B
to be taken
C
taking
D
being taken
Any student ___ will be disqualitified from the exam.
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A
catching cheating
B
catching to cheat
C
caught cheating
D
caught to cheat
He became inspired when he thought about helping ordinary people _________to cholera.
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A
expose
B
exposing
C
to expose
D
exposed
A fire broke out last night, _______ three children and two adults.
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A
killed
B
killing
C
kill
D
to kill
My wish is _____ the people well in the future.
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A
to serve for
B
to serve
C
serving
D
serving for