Question

what do you _________today?

A is the biggest danger to our environment
B has the environemnt been damaged by
C has the factory harmed the environment
D has the greast harm been done to the environment

答案是A，BCD为何不选？

Answer 1

do you后面是不是少了一个think ?
如果是的话，那么全句是：What do you think___ today ?
do you think 作为插入语，后面只能接陈述句的语序，整个句子去掉do you think之后就是一个陈述句：What is the biggest danger to our environment today。

这是一个完整的陈述句，其他的不行，所以选A。
希望能帮到你....望采纳....

追问

是不是插入语后面都用陈述句语序

追答

是的，你在理解的时候可以去掉插入语，看下是不是陈述句语序。