_____ troubles me is _____ I don't know
题型:选择题
问题:
_____ troubles me is _____ I don't know _____ is to be done with the new machine. [ ]
A. What; what; that
B. What; that; how
C. What; that; what
D. What; because; which
_____ troubles me is _____ I don't know _____ is to be done with the new machine. [ ]
A. What; what; that
B. What; that; how
C. What; that; what
D. What; because; which