A
1 If Peter didn't eat many chips, he wouldn't so fat.
2 When Tan comes, the floor has been cleaned by Lan.
3 Mordern submarines have been sent to investigate the seabed.
4 If they hadn't gone by coach, most of them wouldn't have got carsick.
5 If you don't do these exercises carefully, they'll get bad marks.
6 English can be spoken at the club.
7 If you don't have a visa, you can't visit the USA.
8 Would you like to go to the cinema tonight?
B
1 is located
2 came ( peter came -> hành động xen vào, chia quá khứ đơn; his sister was doing the washing up -> hành động đang xảy ra nên chia qúa khứ tiếp diễn )
3 isn't invited
4 is being photographed
5 left
6 are eliminated
C
1 he would have gone to the supermarket.
2 go to bed
