Use mixed conditionals: 1 If I (do) the task yesterday, I (go) to the cinema now. 2 If he (be) a good musician, he (take0 part in the concert yesterday. 3 If they (win) the lottery, they (buy) a car 4 If I (invest) in that company 10 years ago, I (be) rich now 5 If he (not get) a loan, he (not be) able to set up a new business.

I think that our future is not so positive as many people supposed.
There are many disasters of environment pollution nowdays and society doesn't understand it. They don't consider necessary to solve this problem. If we won't change this point of view our planet has sank in the garbige and toxical spillings. I imagine Earth being a big dump in ten years. Pollution of water and air will destroy all living beings and will make human existences' life impossile because we can't survive without drinkable water and fresh air. Humankind must solve this problem now for saving our future.

Перевод
Я думаю, что наше будущее не так позитивно, как многие полагают.
В наши дни существует множество угроз загрязнения окружающей среды и общество этого не понимает. Они не считают важным решение этой проблемы. Если мф не поменяем нашу точку зрения, то Земля утонет в мусоре и токсичных выбросах. Через десят лет, я думаю (в тексте - представляю), что земля превратится в огромную свалку. Загрязнение воды и воздуха уничтожит все живое и сделают невозможной жизнь человеческих созданий (людей), потому что мы не можем жить без питьевой воды и воздуха. Человечество должно решить эту проблему сейчас, чтобы наше будущее.

Ronald and Mary 18 (were driving) along a quite country road in Southern England. They 19 (were) on the way to Westberry. It 20 (was) nearly midnight. ‘Ron! Look over there! There 21 (bis) something in the sky. What 22 (is) it? - ‘I 23 (do not know) what it 24 (is). It 25 (is) probably a plane.’ –‘I 26 (do not think) so, it 27 (is) too big a too bright.’-‘Oh, no!’ - ‘What’s matter?’ – ‘The engine 28 (has stopped)’. - ‘Why 29__did __it (stop)?’- ‘I 30 (do not know). I must 31 (find) a garage.32 (Is) there one near here?’- ‘Yes, there 33 (is) one in the next village. I 34 (am not be) sure if it 35 (is) open. It 36 (is) very late.’
Suddenly there 37 _ (was) a loud noise and a big bright silver object 38 (flew low over their car.) It 39 (stopped) in mid-air, 40 (loomed) round, then 41 (flew) straight up into sky and 42 (disappeared).