—Why does the lake smell terrible?—Because large quantities of water_______________.
#99629
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
I had meant to meet you at the airport this morning but I was too busy for I_______ a report.
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A
wrote
B
was writing
C
have written
D
had written
Now that she is out of job, Lucy ______ going back to school, but she hasn’t decided yet.
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A
had considered
B
has been considering
C
considered
D
is going to consider
Professor Smith, along with his assistants, _________on the project day and night to meet the deadline.
#102351
A
work
B
working
C
is working
D
are working
(2013·高考北京卷)Hurry up！Mark and Carol________us.
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A
expect
B
are expecting
C
have expected
D
will expect
The president hopes that the people will be better off when he quits than when he .
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A
has started
B
starts
C
started
D
will start