问题
选择题
If you don't know what to do, the safest thing to do is __ . [ ]
A. smile
B. smiles
C. to smile
答案
答案：C
搜题请搜索小程序“爱下问搜题”
If you don't know what to do, the safest thing to do is __ . [ ]
A. smile
B. smiles
C. to smile
答案：C
