The teacher said, “Boys and girls, you ________ to meet for the film at the cinema gate at 7∶05．Please be there on time．”
A.shouldB.mustC.are supposedD.are wanted在线课程C
解析：
be supposed to do此处理解为“应当”，相当于should，但should后面应跟动词原形，所以选项A不对。