问题
选择题
-Do we need ____?
-Yes, we do.[ ]
A. happy
B. be happy
C. to be happy
D. being happy
答案
答案：C
搜题请搜索小程序“爱下问搜题”
-Do we need ____?
-Yes, we do.[ ]
A. happy
B. be happy
C. to be happy
D. being happy
答案：C