Jasonusuallyspendshalfanhour

问题详情：

Jason usually spends half an hour __________ his homework every night.

A. in                           B. on                         C. at                         D. to

【回答】

B  spend some time on sth.为固定短语，意为“在某事/某物上花费时间”。

知识点：动词和动词短语

题型：选择题