问题
选择题
I think students _____ to do homework with friends.
A．should allow
B．should be allowed
C．were allowed
D．must be allowing
答案
答案：B
题目分析：句意:我认为学生们应该被允许和朋友们一起做作业。根据句意可知，学生们应该被允许这样做，故应该用被动语态。allow sb. to do sth.的意思是允许某人做某事，它的被动形式是sb. be allowed to do sth.。故应选B。
