- 试题详情及答案解析
- I don’t know ______ with this problem. It’s too hard.
| A．which to do | B．when to do |
| C．what to do | D．how to do |
- 答案：C
- 试题分析：句意:我不知道对于这个问题该怎么办，它太难了。which to do 做哪一个；when to do 什么时候做；what to do 做什么；how to do 怎样做。do with 处理，对待，跟what 连用。故选C。
考点：考查疑问词+动词不定式。