Say the numbers: 1, 245; 20, 645; 45, 288; 11, 999

1245 - one thousand two hundred forty-five
20645 - twenty thousand hundred forty-five
45288 - forty-five thousand two hundred eighty-eight
11999 - eleven thousand nine hundred ninety-nine
если я правильно поняла задание, то вот

You mustn't drop litter in the forest. It is forbidden.

It is Sunday today. Tom doesn't have to wake up early.

It’s going to rain. You should take an umbrella.

He is a very reliable man. You can trust him.

My friends were late again. I had to wait for them for a long time.

If I were you, I would consult a doctor.

If Peter got on well with his group mates, they wouldn't have a quarrel.

They wouldn’t have got together if John didn't go to the party.

If you mix red and white, it gets pink.

If he studies hard, he won't fail the exam.

ex 2

1 we are eating

2 we eat

3 ate

4 eat

5 are eating

6 were eating

7 she often cleans

8 was cleansing

9 is cleaning

10 cleans

11 cleaned

12 is cleaning

ex 3

did they go to the theatre yesterday?

did he play football yesterday?

did your friend have a lunch?

did she swim in the sea?

ex.4

Now he is washing

Every morning he washes

Yesterday he washed

He usually washes

He is washing

Last week he was washing

ex.5

are walking

walk

walked

walk

are walking

were walking

often helps

was helping

is helping

helps

helped

is helping