12. What do you think ______ cut down the big tree?

问题描述:

12. What do you think ______ cut down the big tree?
分析一下此句的结构,它属于哪种复句,选哪个选项?谢谢!

这句应该不是复句,只是简单的特殊疑问句.
What (do you think)__________cut down the big tree?
do you think是插入语.