PERIOD

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I. Điền a/an

1.a uniform

2.an apple

3.an orange

4.an hours

5.a book

II. Chuyển số nhiều

1. knife->knives

2. country->countryes

3. leaf->leaves

4. key->keys

5. tomato->tomatoes

6. photo->photo

III. Hơn hay nhất

1. Hoa is (tall)taller than Lan

2. Summer the is a (hot)hottest in year

3. She is the (careful)most careful in my class

4. City is (crowded)more crowded than village

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