问题补充:
---Where’s your father?
---He to Singapore for a meeting. He there twice.
A. has gone, has been
B. has been, has gone
C. has gone, has gone
D. has been, has been
答案:
(答案→)A. has gone, has been
B. has been, has gone
C. has gone, has gone
D. has been, has been
解析:have been to 表示曾今去某地,而have gone to 表示已经去了某地,故选A