Question

Students ________at school, but now they prefer to have online courses at home.

A.are used to study B.are used to studying C.used to study

Answer

C

【解析】

句意：学生们过去常常在学校学习，但是现在他们更喜欢在家里上在线课程。

考查used to do sth的用法。A. are used to study被用来学习，一般现在时的被动语态；B. are used to studying习惯于学习，be used to doing sth习惯于某事；C. used to study过去常常学习，used to do sth 过去常常干某事。根据后句句意可知，前句是陈述学生们“过去常常干某事”，故选C。