It’sprobablyagoodideaforparentstoallowteenagersto

问题详情：

 It’s probably a good idea for parents to allow teenagers to ______ in groups after school in the afternoon because this help them keep healthy as well as become good friends.

A. study             B. design          C. translate               D. exercise

【回答】

D  

知识点：名词

题型：选择题