________ he can't understand is ________
题型:选择题
问题:
________ he can't understand is ________ his son doesn't like the school.He is very upset about this. [ ]
A. That; why
B. Why; that
C. What; why
D. Whether; that
________ he can't understand is ________ his son doesn't like the school.He is very upset about this. [ ]
A. That; why
B. Why; that
C. What; why
D. Whether; that