问题
选择题
We spend about an hour a day ______ . [ ]
A. do our homework
B. doing our homework
C. do our homeworks
D. to do our homework
答案
答案：B
搜题请搜索小程序“爱下问搜题”
We spend about an hour a day ______ . [ ]
A. do our homework
B. doing our homework
C. do our homeworks
D. to do our homework
答案：B