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【单选题】

It's very important ______ the lessons we have learnt.
[ ]

A.
to review
B.
reviewing
C.
review
D.
reviewed
举报
参考答案:
参考解析:
.
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举一反三

【单选题】Great changes______ in the city since1970.

A.
have been taken place
B.
have taken place.
C.
has taken place
D.
took place

【单选题】单项选择。You look so tired and sad! ______.[ ]

A.
What happened?
B.
What did you do?
C.
What was it?
D.
What?