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1.they knew german well enough,
2.there are no books on the table,
3.he could do this work himself,
4.she has got blue eyes,
5.mary will be the teacher in future,

1.They knew German well enough, didn`t they?

2.There are no books on the table, are there?

3.He could do this work himself, couldn`t he?

4.She has got blue eyes, hasn`t she?

5.Mary will be the teacher in future, won`t she?

Объяснение: