问题
选择题
We don't know ________ it next. Let's go and ask Mr. Li. [ ]
A. what to do
B. to do what
C. whether to do
D. to do whether
答案
答案：C
搜题请搜索小程序“爱下问搜题”
We don't know ________ it next. Let's go and ask Mr. Li. [ ]
A. what to do
B. to do what
C. whether to do
D. to do whether
答案：C