Question

【题目】After class, students ______ clean the chalk off the blackboard.

A. was excepted to B. are supposed to

C. are important to D. was polite to

Answer 1

【答案】B

【解析】

试题分析：句意：下课后，学生们应该把黑板上的粉笔字擦下来。A. was excepted to例外；B. are supposed to应该；C. are important to对……重要；D. was polite to对……有礼貌。结合句意，故选B