Подскажите правильно ли составлены вопросы 1. why were they awarded the nobel prize? 2. what has the basis of many studies on the evolution of life formed? 3. dna is responsible for the transfer of hereditary material from one generation of bacteria to another, isn't it? 4. is dna more important to the inheritance of characteristics than proteins? 5. the most significant scientific event of this century was the investigation by watson, crick and watson into the dna molecule, wasn't it? 6. is more important to the inheritance of characteristics dna or proteins? 7. does dna contain polynucleotide or hydrogen bonds? 8. is dna responsible for the transfer of hereditary material? 9. what has the basis of many studies on the evolution of life formed? 10. what is dna responsible for?

По моим подсчетам, всё правильно

More and more people suffer from air and water pollution. Nature also suffers from land and nuclear pollution. Among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. Fortunately, there are many ways to suspend these problems. If everybody starts caring about the planet we live on, many environmental problems can be solved. 
ПЕРЕВОД:
Все больше и больше людей страдают от загрязнения воздуха и воды . Природа также страдает от земли и химического загрязнения . Среди них увеличение количества автомобилей на улицах , промышленных отходов , миллионная вырубка деревьев , уничтожение места обитания животных , зараженных рек и морей . К счастью, есть много чтобы приостановить эти проблемы . Если все начнут заботиться о планете , на которой живем , многие экологические проблемы могут быть решены

1.

1) could  - can

2) would  - will

3) might  - may

4) had to  - must

5) that  - this

6) those -  these

7) there - here

2.

“You must leave,” he told us.

He told us (that) we had to leave.

3.

1) states the exact words that a speaker used - Direct Speech (sometimes called quoted speech)

2) reports what the speaker said but without using the exact words - Indirect Speech (also called Reported Speech)

4.

1) Past Simple (did)  - Present Simple (do/does)

2) Past Continuous (was/were doing)  - Present Continuous (am/is/are doing)

3) Past Perfect (had done)  - Present Perfect (have/has done)

4) Future in the past (would do) - Future Simple (will do)

5.

She says, "I like chocolate."

She says (that) she likes chocolate.

6.

1) then  - now

2) that day  - today

3) the day before / the previous day  - yesterday

4) a week before / the previous week  - a week ago

5) the week/month/year before / the previous week/month/year  - last week/month/year

6) the following week/month/year  - next week/month/year

7) three years from then  - in three years

8) the next / the following day  - tomorrow

9) that night - tonight

7.

“Are you feeling well?”

4) I asked him if he was feeling well.

8.

“Keep to a diet!” he told me.

He told me to keep to a diet.

9.

“Why did you come late?” she asked.

4) She asked him why he had come late.

10.

told, offered, said, invited, promised

Примечание:

Во втором и пятом упражнениях я поставила that в скобку, потому что и с that, и без него предложение будет правильным.