题目内容

Please ________ look outside. Look at the blackboard.

A. not
B. don’t
C. aren’t
D. can’t

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________ climb the tree. It is dangerous.

A. Doesn’t
B. Not
C. Don’t
D. Isn’t

________ me your driving license, please.

A. Show
B. To show
C. Showing
D. Showed

We are at the library . Please ________ quiet .

A. do
B. be
C. can
D. are

基于物理学中,三角形具有稳定性这一原理,衍生出攀岩的()平衡。

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