题目内容：

--Who ___to clean the blackboard __class?--The students of Team Two are

优质解答

are(根据下文The students of Team Two “are”提示,be to 表将要,按计划的),
after
after class ,课后.

追问：

原题是 -Who ___to clean the blackboard __class?--The students of Team Two are A.am going;this B.are going;before C.want;this D.would like;in the

追答：

选B before class 课前。this class 这节课 in the class 在教室 （in class 课上 ） be going to do sth. 将要做某事