Though to see us the professor gave us a warm welcome.A. surprisingB. was surprisedC. s

问题补充：

Though to 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：考查状语从句的省略。Though 后面省略了he was,句意：尽管教授看到我们很吃惊，但是他还是热情的欢迎了我们。所以选C。