单项选择题

Every teacher ought to（）kids to think about current issues.

A.incorporate
B.reinforce
C.challenge
D.transform

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单项选择题
The sale usually takes place outside the house, with the audience（）on benches, chairs or boxes.

A.seated
B.seating
C.having seated
D.having been seated
单项选择题
Beijing has reiterated that（）will China use nuclear weapons first.

A.under no circumstances
B.under any circumstances
C.under every circumstances
D.under all circumstances
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