Ответ:  A) 1. went  

2. did not like; was playing

3. broke; was

4. was; came

5. told; helped

6. did not visit; preferred

7.  Did they visit their grandparents yesterday?

8. Who was with you when the accident happen?

B: 1. was studying

2. did not do

3. did not play

4.Were they listening music when you opened the door?

5. went

6. was playing; had

7. were watching

8. was beginning

C:

по порядку: was;

came;            

were not;

were;

were walking;

found;

was not;

was;

did not continue;

were;

had to;

found;

did;

were walking;

asked;

told;        

was;

knew;

happend;          

continued.

Объяснение: