Parents always ask their children to spend more time ( ) and not to waste much time ( ）.Parents always ask their children to spend more time ( ) and not to waste much time ( ).选项：①to study ,to play ② studying ,play③studying ,to play ④ studying ,playing
问题描述：
Parents always ask their children to spend more time ( ) and not to waste much time ( ）.
Parents always ask their children to spend more time ( ) and not to waste much time ( ).
选项：
①to study ,to play ② studying ,play
③studying ,to play ④ studying ,playing
答
1.答案：④ studying,playing
2.
固定短语：
spend time (in) doing sth 花费多少时间做某事；
waste time (in) doing sth 浪费多少时间做某事