问题详情：
The Greens used to live in London and now they in Beijing.
A. used to live B. are used to live
C. are used to living D. are used for living
【回答】
C 句意：格林一家过去住在伦敦，但是现在他们习惯于住在*。used to do sth.“过去常常做某事”；be used to doing sth.“习惯于做某事”，故选C。
知识点：动词和动词短语
题型：选择题