I’msurethatmiddleschoolstudentswillbenefit

问题详情：

I’m sure that middle school students will benefit _______taking exercise every day, which is ______ great benefit ____ their health.

   ; of; at       ; of; to      ; by; to         D. by; from; at

【回答】

B

知识点：介词

题型：选择题