—I think it is going to be a big problem
问题:
—I think it is going to be a big problem.
—Yes,it could be.
—I wonder__________we can do about it.
A.if
B.how
C.what
D.that
—I think it is going to be a big problem.
—Yes,it could be.
—I wonder__________we can do about it.
A.if
B.how
C.what
D.that