We are ( )at the bad news. A:surprising B:surprised C:surprse D:to surprise

B:surprised
be surprised at:对。。。。。。感到惊讶
用在人身上的+ed
用在事物身上的+ing

B be suprised at 是个固定短语 surprised 可以解释为动词的过去分词坐定语

B,be surprised at，表示对什么很惊讶
surprising,表示令人惊讶
surprising和surprised都是由surprise变换而来的，前者有主动含义，后者有被动含义，surprising的主语通常是物，而surprised的主语通常是人。Be surprised at + n. (v. + ing) 对……感到惊讶，be surprised后还可接不定式和that引导的从句。例如：
The students were very interested in dinosaurs when they visited the museum. They were surprised at seeing the teacher in front of them. Do you know why they surprised to meet their teacher in the museum?
学生们在参观博物馆时对恐龙很感兴趣。他们很惊讶地看见老师就在他们前面。你知道在参观博物馆时，为什么他们对遇见老师感到很惊讶吗？
surprise是名词，表示吃惊，如to one's surprise让某人吃惊的是。

be surprised at 后面加名词
对.感到惊讶

B 人物做主语, Sb. be surprised at sth. 对...感到惊讶.

B

选 B:surprised 。因为A选项surprising的主语应该是事，物，而题目中主语是we。C 选项surprise是动词，题目中已有be 动词，不能再用动词。D选项to surprise没有这种说法,应该是to one's surprise