1. It is a good idea to eat a lot of fruit and vegetables every day

=> We should eat a lot of fruit and vegetables every day

2. We couldn't keep on cleaning the streets because of the heavy rain.

=> Because it rained heavily , We couldn't keep on cleaning the streets

3. The garden party won't take place if the weather doesn't improve.

=> Unless the weather improves , the garden party will take place

4. Both students and teachers can borrow books from the library.

=> The library lend books to both students and teachers

5. Nobody plays this piece of music as beautifully as he does.

=> He plays this piece of music the most beautifully

6. It’s a good idea to eat a lot of fruit and vegetables every day.

We should It is a good idea to eat a lot of fruit and vegetables every day.

7. We couldn’t keep on cleaning the streets because of the heavy rain.

Because it rained heavily,we couldn't keep on cleaning the streets.

8. The garden party won’t take place if the weather doesn’t improve.

Unless  the weather improved,the garden party won't take place.

9. Both students and teachers can borrow books from the library.

The library lend lend both students and teachers books.

10. Nobody plays this piece of music as beautifully as he does.

He plays this pieces of music most beautifully.