Question

---I don’t know ___________next.
----You’d better finish your homework first.

A．when to do

B．how to do

C． what to do

D．where to do

Answer 1

C

试题分析：句意：---我不知道下一步做什么?---你最好先做你的作业，疑问词+不定式，A when to do 何时做 B how to do 怎么样做  C  what to do 做什么  D where to do去那做。根据语境故选C。