This is book. it is my book .где здесь нужно поставить артикль?

His is a book. it is my book

It's my book я думаю так

Прогресс чек 7 у меня на 74 стр.4.1.we went to the cinema on last sunday      2.she had a cold a week ago        3.it is beautiful day yesterday        4.i saw carol on the bus last tuesday        5/they travelled to london a month ago5.( можешь сам придумать)1.i sleeped yesterday      2.i played yesterday      3.i did homework yesterday6.1.c      2.b      3.d       4.a

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