Thoughto see us the professor gave us a warm welcome.A. surprisingB. was surprisedC. surp

问题补充：

Thoughto see us, the professor gave us a warm welcome.

A. surprising

B. was surprised

C. surprised

D. being surprised

答案：

A. surprising

B. was surprised

(答案→)C. surprised

D. being surprised

解析：非谓语动词考查题。过去分词作状语表示分词与句子主语为被动关系。句意：虽然见到我们使教授很吃惊，教授还是热情欢迎了我们。