Câu 3. Bài tập 3: Điền vào ô trống với danh từ số nhiều của từ trong bảng day dress tooth country foot shelf coach sandwich 23. She always has two .........and an orange for dinner. 24. Tom cleans his .........after every meal. 25. How many ...........are they staying here? 26. There are two ........outside to take them to the museum. 27. I have friends from ten different................. 28. He needs some more ............to put all his books on. 29. My.......hurt after all that walking. 30. Daisy wants to buy two new................to wear on holiday.