Bài 1 : rewrite the following sentences :
1. Let's go camping in Suoi Mo . ( don't )
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2.How much is a bottle of cooking oil ? (dose)
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3.No body in my class is fatter than Hoang . ( fattest )
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4.What is the price of these apples ? ( cost )
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5. It 's always hot in the summer . (never )
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6.The Mekong river is longer than the red river . ( shorter )
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