635.Though _____ to see us,the professor gave us a warm welcome.
A.surprising
B.was surprised
C.surprised
D.being surprised
636.________ the city center,we saw a stone statue of about 10 meters in height.
A.Approaching
B.Approached
C.To approach
D.To be approached
635.答案是C;考查让步状语从句的省略结构。
636.答案是A;现在分词作状语，表示正在进行的动作。此题中we和approach之间为主动关系，故考虑用现在分词。
