问题
选择题
I'm not sure _______. [ ]
A. you can help me with my Maths
B. if he is able to swim or not
C. how soon he will be back
D. how long does it take to finish the job
答案
答案：C
搜题请搜索小程序“爱下问搜题”
I'm not sure _______. [ ]
A. you can help me with my Maths
B. if he is able to swim or not
C. how soon he will be back
D. how long does it take to finish the job
答案：C