题目内容：

We haven't heard from her for a long time.————What do you suppose ____to her?
A.was happening B.to happen C.has happened D.having happened
为什么不选B呢?

优质解答

do you suppose 是插入语,分析的时候可以把它去掉
前面使用的是现在完成时 ,所以对应后面也该使用现在完成时
We haven't heard from her for a long time.——What has happened to her?
表示过去发生的动作对现在的影响.
选B 句子缺少谓语