Question

The children were surprised by the sudden _____ of their teacher.            

A．enter

B．entrance

C．entry

D．come

Answer 1

C

单词辨析。the sudden _____中，sudden是形容词，用来修饰名词，enter和come是动词，排除A,D；entrance入口；entry进入。句意：孩子们对于他们老师的突然进入感到吃惊。所以选C。