问题

We are going to Jiuzhaigou this summer. —— ________________.
A:used to live; is used to living
B:is used to living; used to live
C:used to live; used to living
D:is used to live; is used to living;
B:is used to living; used to live
C:used to live; used to living
D:is used to live; is used to living;
正确答案是: