Question

【题目】In China the students _______ greet the teachers when classes begin.

A. are supposed to B. were supposed to C. supposed to

Answer 1

【答案】A

【解析】

试题分析：句意：在中国，学生们在上课前应该欢迎老师。考查的结构是be supposed to do sth意思是应该做某事，时态为一般现在时态。因主语students是复数形式，系动词be应用are，故选A。