——There's a police car in front of our neighbor's house.——() do you suppose has happened?
问题描述：
——There's a police car in front of our neighbor's house.——() do you suppose has happened?
A.Why B.When C.What D.It
答
选What
简单句为what has happened?即,发生了什么?
do you suppose作为插入语,意为"你认为“,全句：你认为发生了什么?