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Lesson 20 Look at them,Look at that boys shoes. Are they dirty? No, they arent dirty. Theyre clean.,those postmen,Look at Are they ? No, they arent . Theyre .,those shoes,Look at Are they ? No, they arent . Theyre .,those shops,Look at Are they ? No, they arent . Theyre .,those cases,Look at Are they ? No, they arent . Theyre .,grandmother and grandfather,Look at Are they ? No, they arent . Theyre .,those hairdressers,those hats,those policemen,those trousers,