—Excuse me does Mr. Chen live here?—He be here but he has moved to Nanjing.A. used to

问题补充：

—Excuse me, does Mr. Chen live here?

—He be here, but he has moved to Nanjing.

A. used to

B. happened to

C. tried to

D. had to

答案：

(答案→)A. used to

B. happened to

C. tried to

D. had to

解析：used to do sth 表示过去常常做某事。