50. Teachers should be with their students but should not be on them.A. hard; strictB. s

问题补充：

50. Teachers should be with their students but should not be on them.

A. hard; strict

B. strict; hard

C. hardly; strictly

D. strictly; hardly

答案：

A. hard; strict

(答案→)B. strict; hard

C. hardly; strictly

D. strictly; hardly

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