To keep the learning environment free from （）, cell phones are not permitted for use during instructional time.

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To keep the learning environment free from （）, cell phones are not permitted for use during instructional time.

A.concentration

B.allocation

C.participation

D.distraction

正确答案：distraction

Tag：硕士生英语进阶时间：2021-11-27 15:10:57

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