C Match the pairs.

1 Leo Tolstoy - b wrote many books.
2 That woman next to you - a has written many books.
3 Mark watched the film - a yesterday.
4 Mark has watched the film - b today.
5 He's been to Berlin - a He will be back next Monday.
6 He's gone to Berlin - b He got back last night.
7 I really need it - a now.
8 I really needed it - b then.
9 It hasn't rained for months - b so there isn't much water.
10 It didn't rain for months - a so there wasn't much water.
11 Kangaroos live - a in Australia.
12 Kangaroos have lived - b in Australia for a long time.
13 Sheila bought a bike - a when she was on holiday.
14 Sheila has bought a bike - b but she never uses it.
15 'What happened next?' - a 'Let's wait and see'.
16 'What happens next?' - b 'Look in the newspaper.'