Question

【题目】People are supposed____________ hands when they meet for the first time in America.

A. shaking B. to shake C. shake

Answer 1

【答案】B

【解析】句意：在美国，人们第一次相见的时候应握手。

A. shaking现在分词形式；B. to shake动词不定式 ； C. shake动词原形。Be supposed to do sth应该做某事，为固定用法，故选B。