1 . When he got better, he looked forward to_______________(go) back to work as soon as possible. (所给词的适当形式填空)

2 . This is the last time I ______ Shanghai. I still remember the first time I ______ there was in 2005.

A．have visited, went	B．had visited, went
C．visited, had gone	D．had visited, had gone

3 . I felt very tired when I got home and I _______ straight to bed.

A．go	B．went
C．had gone	D．have gone