They Hong Kong twice.A. have gone toB. have been toC. have been inD. have gone in

问题补充：

They Hong Kong twice.

A. have gone to

B. have been to

C. have been in

D. have gone in

答案：

A. have gone to

(答案→)B. have been to

C. have been in

D. have gone in

解析：have been in强调“过去曾去过”之意；have been to的意思是“去过而现在已返回”；have gone to的意思是“去了，而且没回来”，故根据句意选B正确。