问题

The teacher commanded that the classroom should_____at once
A:clean
B:cleaned
C:be cleaned
D:be cleaning;
B:cleaned
C:be cleaned
D:be cleaning;
正确答案是:
同类题型
Today’s ceremony ____ 60 years’ development ofEducation in this key high school
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Why didn’t you go to the party last night — I __________.
Were you sickafter six hours’ journey on the coach—Of course. I quicklyas soon as it stopped.
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