I wonder we can solve this hard problem.A. what elseB. how elseC. thatD. as if

I wonder we can solve this hard problem.
A. what else
B. how else
C. that
D. as if

A. what else(答案→)B. how elseC. thatD. as if解析：考连词how else的用法。how else=in what other way。如选A项，句子应当改为:“I wonder what else we can do to solve this problem”而用C、D项不合句意。

这个问题我还想问问老师呢