is to be done is to carry it out smoothly since the decision has been made.
A. What; how
B. Where; how
C. When; what
D. Where; what
网友回答
A. What; how
B. Where; how
C. When; what
D. Where; what
解析：选A。考查主语从句。句意: 既然已经做出了决定, 要做的就是如何去顺利完成。根据句意“需要做的……”用what; 语境“如何顺利完成……”用how, 故答案为A。