题目内容

Sometimes we need to step ________ and don't be in such a hurry.

A. back
B. forward
C. backward
D. front

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Have you set ________ some time and energy for your after-school learning?

A. apart
B. aside
C. away
D. aloud

We need to ensure that every ______ threat or barrier to the new way of communication is removed.

A. secret
B. feasible
C. doubtful
D. potential

Scientific ______ is an important driving force for industrial revolution.

A. motivation
B. creation
C. innovation
D. operation

The new smartphone is expected to ______ its debut at tonight’s launch event.

A. have
B. launch
C. make
D. perform

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