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11a, 12a

Объяснение:

11 Порядок слов

12 at the moment - сейчас что делает - чистит

Какой класс?

1. my sister is leaving to her place at the moment

2.i read this book yesterday

3. you are playing the piano tomorrow

4.we are returning from   the museum now.

5. our friends didn't see mary every day

6. the new school began to work last year

7. he often speaks to me

8. he was discussing the problem the whole morning yesterday

9.i will not be reading this article at 2 o'clock tomorrow.

i do not like  school  form.i  prefer  the school  dress code  free. becausei  think it's  comfortable and convenient.