Chuyển câu cho nghĩa không đổi

1) It is a long time since we last met.
=> We haven't_________________________________________________________
2) When did you have it ?
=> How long _________________________________________________________
3) This is the first time I had such a delicious meal .
=> I haven't_________________________________________________________
4). Even though the work was very hard, we enjoyed doing that job. (in spite of)
_________________________________________________________________