✔ 最佳答案
1.) (Please) Call me when you come back.
2.) Are you available today?
3.) It has been a long time. / There is a long time that we have not seen.
4.) Do you remember me?
Hope that you find it useful.
2010-07-29 21:13:05 補充:
Answer 2 can also be asked in this way:
Are you free today?