But to his surprise, they all agreed to go with him. 但是让他惊讶的是，他们都同意与他一起去。

点拨：①意为"让某人惊讶的是"。相似的结构：让某人高兴的是，让某人失望的是。

如：To my disappointment, I didn't pass the exam.

②意为"同意做某事"。

如：He didn't agree to give his son so much money.