Bµi 4:Tìm lỗi sai trong mỗ câu sau. 21. Which is the longer river in Viet Nam? A B C D 22. What color is his hair? ~ They‟re black. A B C D 23. What‟s sports does Nam play? ~ He plays soccer and swims. A B C D 24. We shouldn‟t pollute the environment. We shouldn‟t wasting water A B C D Baig 5: Điền từ thích hợp vào chỗ chấm trong đoạn văn và chon đáp án đúng trả lời câu hỏi ở dưới đây. Huy‟s grandfather is a farmer. He (25) ……… up very early in the morning because he has many things to do. First, he feed the pigs (26) ……… chickens. There (27) ……. six pigs and twenty chickens. Then, he leads the buffaloes to the field. There, he waters the vegetables and plows his small paddy field. Finally, he milks the cows. His (28) ……… produce ten liters of milk everyday. 29. Is Huy‟s grandfather a farmer? A. Yes, he is. B. No, he isn’t. C. He is a farmer. D. He isn’t a farmer. 30. Why does he get up early in the morning? A. He has many animals. B. He has to get up early in the morning. C. Because he has many things to do. D. Because he likes getting up early. 31. Does he lead his pigs and chickens to the field? A. Yes, he does. B. No, he doesn‟t. C. Yes, he has. D. No, he hasn‟t. 32. How much milk do his cows produce everyday? A. a little B. a few C. very much. D. ten liters.