题目内容：

Though ______ to see us,the professor gave us a warm welcome.
A.suprising B.was surprised C.surprised D.being surprised
为什么
B呢？

优质解答

可理解为过去分词作原因状语,逻辑主语是the professor ,形容人感到……用过去分词.也可理解为省略句Though（he was surprised) to see us,the professor gave us a warm welcome当状语从句的主语与主句一致,且动词为...