He practiced as often as he could ______爱下问搜题

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问题选择题

He practiced as often as he could _____ his spoken English. [ ]

A. improve

B. improving

C. to improve

D. improved

答案

答案：C

选择题

To keep the air clean, this hospital forbids all the patients _____ in and around it.

A. to smoke
B. smoking
C. to be smoking
D. smoked

多选题

平移和旋转的共同点是：物体或图形只是（　　）发生了变化，（　　）和（　　）没有发生变化。