A. left　　　　　B. gone　　　　　 C. been away　　 D. been left

选择填空:

They have ______ for a long time.　　　　　　 

[　　]

A. been away　　　　 B. left

C. been away from　　D. left from

选择填空:

They _____ for 3 hours.

［　　 ］

A. have left　　　　  B. have gone

C. have been away　　 D. have started

补全对话

　　A：I heard you will take a(1)______ around the world．

　　B：Yes．I've been planning it(2)______ a few years．

　　A：How(3)______ will you been away?

　　B：I'm not sure．

　　A：I(4)______ I could join you．

　　B：Don't worry．Some day you'll get a(5)______ to take a similar trip．

— Hello! Could I speak to Mr. Liu, please?

— Sorry. He _______for a month.

A. had been away　 　 B. left　　 　　　　　　　　 C. has been away