Составьте пожалуйста формулу гидроксид пропиламмония и хлорида метиламмония

Напишите правельную форму глаголов.

1. He ............................................. (wash)  his car last Saturday.

2. He ..............................................(wash) his car at the momen

3. He often .....................................(wash) his car

4. We ...............................................(buy) the chair a month ago

5. They ............................................(make) friends when they ........... (be) little children

6. She ..............................................(do) a grammar exercises

7. She is pupil. She often..............(do) grammar exercises.

8.She.................................................(do)the exercise an hour ago.

9. My grandfather.............................(work) at the circus when he.....(be) young/

10. Do not  ask him any questions now..............(work).

привезли 90 компьютерных дисков.В 7 упаковках по 6 дисков в каждом и в нескольких упаковках по 8 дисков.Сколько было упаковок по 8 дисков?