1 d
2 a
3 b
4 b
5 c
6 a
7 b
8 c
2 1 I have been packing my case all the morning.
2 She hasn't been cooking since 3 o'clock.
3 1 The old lady was bitten by the dog.
2 The chess are played by us every day.
3 Five hamburgers were eaten by Tom and me.
4 My e-mail is checked by me every day.