1. a) i don’t like chicken. b) i doesn’t like chicken . 2. a)laura like orange juice. b) laura likes orange juice. 3. a) pat, do you like sandwiches? b) pat, does you like sandwiches? 4. a) we likes chocolate. b) we like chocolate. 5. a) does she like chocolate? b)do she like chocolate? 6. a)mandy, do you like pizza? b)mandy, does you like pizza? • 7. a) i like rice. b) i likes rice. 8. a) does theo like sandwiches? b) does theo likes sandwiches? • 9. a)they doesn’t like cake. b) they don’t like cake. 10. a) do you like vegetables? b)does she like vegetables?

1a 2b 3a 4b 5a 6a 7a 8a 9b 10. оба варианта верны, но я полагаю что там где-то ошибка. если в обоих вариантах должно было быть she, то верный b, а если должно было быть you, то верный а. 

The idea that human beings will eventually colonize space, has been at the heart of science fiction

ever since Jules Verne wrote 'From the Earth to the Moon’ in 1865,  but the idea has never been taken seriously - until now.

Now scientists are afraid of an increasing risk of being wiped out by a sudden global warming or a genetically engineered virus. Other experts point out that we are rapidly exhausting the Earth's resources while the population continues to grow.

However, how realistic is such a move? Travelling to another planet capable of supporting human life remains an impossibility. Even the journey to the nearest star beyond our sun, would take about 100,000 years.

Clearly then, unless scientists come up with a way for us to travel faster than the speed of light, we  have to look for alternative solutions. A more realistic possibility is to build a permanent base on the moon, perhaps as a stepping stone for voyages to other planets.

There is no doubt that our planet is struggling under the burden of humanity.

However, that does not mean that we should wring our hands in despair.

History shows that man has an incredible capacity to adapt and survive.

Only a few years ago things that we now take for granted, such as instant communications through the Internet, would have seemed impossible.

Perhaps we shall soon see the dreams of science-fiction writers become reality.

Объяснение:

Идея о том, что люди в конечном итоге колонизируют космос, была в центре научной фантастики

с тех пор, как Жюль Верн написал "С Земли на Луну" в 1865 году, но эта идея никогда не воспринималась всерьез - до сих пор.

Теперь ученые опасаются растущего риска быть уничтоженными внезапным глобальным потеплением или генетически модифицированным вирусом. Другие эксперты отмечают, что мы быстро истощаем ресурсы Земли, в то время как население продолжает расти.

Однако насколько реалистичен такой шаг? Путешествие на другую планету поддерживать человеческую жизнь, остается невозможным. Даже путешествие к ближайшей звезде за пределами нашего солнца заняло бы около 100 000 лет.

Тогда ясно, что если ученые не придумают , позволяющий нам путешествовать быстрее скорости света, нам придется искать альтернативные решения. Более реалистичной возможностью является строительство постоянной базы на Луне, возможно, в качестве отправной точки для полетов на другие планеты.

Нет никаких сомнений в том, что наша планета борется под бременем человечества.

Однако это не значит, что мы должны в отчаянии заламывать руки.

История показывает, что человек обладает невероятной при и выживать.

Всего несколько лет назад вещи, которые мы сейчас считаем само собой разумеющимися, такие как мгновенная связь через Интернет, казались бы невозможными.

Возможно, скоро мы увидим, как мечты писателей-фантастов станут реальностью.

1. my friends have already gone abroad.  my friends haven't gone abroad yet. have my friends already gone abroad? have my friends already gone abroad or to the  neighbouring town? where have my friends gone? who has already gone?   my friends have already gone abroad, haven't they? my friends haven't already gone abroad, have they? 2.  she had done this work by 5 o’clock yesterday. she hadn't done this work by 5 o’clock yesterday. had she done this work by 5 o’clock yesterday? had she done this work by 5  or 6 o’clock yesterday? what had she done by 5 o’clock yesterday? who had done this work by 5 o’clock yesterday? she had done this work by 5 o’clock yesterday, hadn't she? she hadn't done this work by 5 o’clock yesterday, had she? 3.  i will have written the letter by the end of next week.  i won't have written the letter by the end of next week. will i have written the letter by the end of next week? will i have written the letter by the end of next week or by the end of next  month? what will i have written by the end of next week? who will have written the letter by the end of next week? i will have written the letter by the end of next week, won't i? i won't have written the letter by the end of next week, will i?