Don't waste much time_____computer games.You should work hard at your lessons.

问题描述:

Don't waste much time_____computer games.You should work hard at your lessons.
A.play B.played C.playing D.to playing

waste time (in) doing sth.
浪费时间做…
in可以省略,但后面的形式一定是ing形式.
所以答案是C.