You need to do more _______ if you wnat to be strong and fit.A exercise B exercises C an exercise D exercising

问题描述:

You need to do more _______ if you wnat to be strong and fit.
A exercise B exercises C an exercise D exercising

选B,应为exercise当锻炼讲是可数的,例如一些体操什么的都是分节的。

A

A
这里的exercise 作锻炼讲,不可数

A exercise