问题
选择题
The math problem is so hard. I really don't know_____. [ ]
A. how to do it
B. how to do
C. what to do it
答案
答案：A
搜题请搜索小程序“爱下问搜题”
The math problem is so hard. I really don't know_____. [ ]
A. how to do it
B. how to do
C. what to do it
答案：A