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Ай-ай-ай, просишь ответы на New English File, оксфордский учебник, лучше бы сам делал
3) It's a lovely park with a lot of beatiful trees
4) There was a woman in the car with two men
5) Sheeps eat grass
6) David is married and has three children
7) Most of my friends are students
8) -
9) We went fishing, but we didn't catch any fish
10) Do you know any person in this town?
11) I like your trousers.
12) The town centre is usually full of tourists
13) -
15) This scissors isn't very sharp