_____ we were worried about was _____ th
问题:
_____ we were worried about was _____ they could manage to control the pollution. [ ]
A. That; how
B. What; whether
C. That; whether
D. What, that.
_____ we were worried about was _____ they could manage to control the pollution. [ ]
A. That; how
B. What; whether
C. That; whether
D. What, that.