Exercise 1: chuyển các câu sau sang số nhiều:
1.This house is big
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2.Is it your pen? Yes , it is
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3.Is that couch small? No , it isn't.
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4.It's a big bookshelf.
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5.What's that? It's an eraser.
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6.There is an armchair in the living room.
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giúp mk nha