1.B: No, I can't.Could you swim when you were five?
A:No,I couldn't.
2.I have got a car now,but I haven't got a bicycle.I had a bicycle when I was six.
3.There is a bank opposite the cinema, but fifty years ago there wasn't a bank - there was a hotel,but it isn't there now.There weren't any shops then,but there were a lot of green fields.Now there aren't any green fields,but there are a lot of shops.
4.When he was five, he had a cat as a pet.He hasn't got any dogs.Now he has three dogs,but he hasn't got any cats.
5.When I was five,I could ride a bicycle,but I couldn't ride a motor bike.Now I can ride ("ride" nu este pus in carte pentru ca cel mai probabil au uitat sa-l puna dar nu are inteles fara ride asa ca l-am pus eu) a motor bike and I can ride it very well.