题目内容

Is it really necessary to ______ experiments on animals?

A. conceal
B. conduct
C. conclude
D. condemn

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Recent research proves that rewards fail to ______ students to work harder.

A. motivate
B. modify
C. monitor
D. moralize

Only by reasoning can we ______ people completely.

A. confuse
B. confine
C. convince
D. console

Providing the children with a ______ environment is very crucial in their growing up years.

A. serious
B. stable
C. staple
D. shabby

Let’s all calm down and have a ______ conversation.

A. reckless
B. reluctant
C. random
D. rational