Question

what have you decided to do

Have you decided_____next A to do what Bwhat to do 为啥,不是 decide to do吗

Answer 1

B
Have you decided what to do next.
what to do next 是带疑问词的不定式短语作宾语的
此结构的形式是：
【疑问词+ to + 动词原形】----所以不可以选A
全句意为：你已经决定下一步该怎么做了吗?