【单选题】
The problem, according to the experts, is （） we should do with the salty land.
The problem, according to the experts, is （） we should do with the salty land.
A、 what
B、 whether
C、 how
D、 that
题目答案
A
答案解析
略
A、 what
B、 whether
C、 how
D、 that