A good student usually knows how to sum up knowledge.
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Let go of my arm ,you are hurting me.
A. 对
B. 错
They will go_to build another laboratory building.
A. on
B. in
C. to
D. at
After years of great effort their company developed into one of the large.
A. 对
B. 错
Be careful not to involve yourself .
A. 对
B. 错
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