Question

【题目】You should do more_____. Don’t always sit at the desk busy doing your_____.

A．exercise, exercise B．exercise, exercises

C．exercises, exercises D．exercises, exercise

Answer 1

【答案】B

【解析】

试题分析：do exercise意为“锻炼，运动”，其中的exercise为不可数名词；do one’s exercise意为“做练习，做作业”，此处的exercise为可数名词。