Question

Sam spends two hours _______ his homework every day.
A. to do                B. doing            C. do  

Answer 1

B

试题分析：spend用于sb spend...on sth或者sb spend...in doing sth（in可以省略），spend的主语必须是人，可以指花费时间、也可以指花费金钱；句意：萨姆每天花费两个小时做作业。结合语境可知选B。