XVII. Complete the text with the correct verb form: the present perfect simple or present perfect continuous. When both the verb forms are correct, use the present perfect continuous.

Brain workouts

Kevin Wilson is not usually a fan of computer games, but recently he(1) _____ (play) one particularly game a lot. In fact, he(2)______ (play) it every day for six weeks. It's a special kind of game which is designed to increase brainpower by giving the player mental exercises. 'I'm definitely improving,' he says. 'I (3) ______(get) much better scores recently'
Wilson is one of 11,000 volunteers who( 4)______(take) part in a scientific study organised by a Cambridge scientist called Adrian Owen. Its purpose
is to find out if brain-training really works. Half of the volunteers (5)____(not use) the brain-training programmes at all; they
(6)_____(surf) the internet instead.
Owen (7)_____ (conduct) several studies of this kind, and they (8)______(show) the same thing: brain-training has a small positive effect on mental abilities, but surfing the internet is just as good!



XVIII. Complete the text about British tennis player Andy Murray. Use the present perfect simple or present perfect continuous form of the verbs in brackets. When both the verb forms are correct, use the present perfect continuous.

Andy Murray (1)_____(play) tennis since he was three years old. Since April 2007, the Scots (2)____ (be) one of the top ten male tennis players in the world. He (3)_____ (train) with some of the best trainers since his teens, and he (4)_____ (win) matches in Qatar, at Wimbledon and at the US Open. He (5)_____even (beat) top players Roger Federer and Rafael Nadal. However, he still (6)_____(not win):a Grand Slam. Murray's family home is in Dunblane in Scotland, but he (7)______(live) in London for the past few years. He(8)_____already_______(publish) his autobiography, which is amazing for someone so young.