—Excuse me is Mr Green in the office?—No. He Singapore for a meeting. He will be back in

问题补充：

—Excuse me, is Mr Green in the office?

—No. He Singapore for a meeting. He will be back in a few days.

A. have gone to

B. has gone to

C. have been to

D. has been to

答案：

A. have gone to

(答案→)B. has gone to

C. have been to

D. has been to

解析：have/has gone(to) 意为“已去某地了，强调人不在说话的地方；have/has been (to)意为“已去过某地，强调人不在已去过的地方。据答句中He will come back in a few days. 可知选B。