Though to see us, the professor gave us a warm wele.
A. surprising
B. was surprised
C. surprised
D. being surprised
网友回答
A. surprising
B. was surprised
(答案→)C. surprised
D. being surprised
解析：考查省略结构和非谓语。这里把句子补完整就是：Though he was surprised to see us ……，主语一致，分词作状语 省略主语和系动词。用being done的结构一般是解释为“正在被做……”显然这里用这个解释不通。