问题
选择题
Sam spends two hours ______ his homework every day. [ ]
A. to do
B. doing
C. do
D. does
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Sam spends two hours ______ his homework every day. [ ]
A. to do
B. doing
C. do
D. does
答案：B