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Ответ:

17.

1. How much

2. How many

3. How much

4. How many

5. How many

18

1. isn’t it?

2. have you?

3. can’t you?

4. doesn’t he?

5. doesn’t she?

19

1. When did Greg finish repairing his bicycle?

2. How long was Nelly working at her English?

3. Where is my sister?

4. What is little Millie doing at the moment?

5. When did aunt Pam get a postcard from her cousin?

20

1. doesn’t have to

2. have to

3. has to

4. do you have to

5. don’t have to  

Объяснение: