-What do you think him so upset? -I have no idea because I wasn’t at home then.
来源：网络
时间：
推荐文章
—What doyou think __________ him so upset?
—I haveno idea because I wasn’t at home then.
A. making B.made
C.to make D.to have made
试题答案
答案：B
提示：doyou think是插入语，去掉后可以看出空白处的动词是谓语动词，应用过去时态。
|