2 complete the sentences. use the verbs and
prompts in brackets to help you.
1 i'm sure everyone will an internet
connection in the future. chave - certain)
21 my mobile phone next month, i'm not sure
yet (change - not certain)
my brother ever all his friends on facebook,
it's impossible, he's got too many!
(meet - certain)
4 my fnends early tomorrow to watch the
sunrise (get up - not certain)
5 my me later, it's
cheaper than a phone call. (skypetm -- certain)
6 human on another one planet one day,
when travel in space becomes easier and quicker.
(live - not certain)
Life appeared on Earth about 3.5 billion years ago. Since then, the Earth's biosphere significantly altered the atmosphere and other abiotic factors, causing the quantitative growth of aerobic organisms as well as the formation of the ozone layer, which together with the Earth's magnetic field weakens harmful solar radiation, thereby maintaining the conditions for life on Earth