Unit 4 At the farm 复习Listen and guess: What are they? They are.horsescowssheephenstomatoespotatoesgreen beanscarrotshenshorsescowssheepWhat is it?It is an apple.What are these?They are apples.appleapplesWhat is it?It is a tomato.What are these?They are tomatoes. What are these?They are carrots.They are so big!Is it a dog?Yes,it is.Are these cats?Yes, they are.What are those?What are these?They are horses .What are those?（ ）1.Are they goats? A. 它们是山羊吗？ B. 它们是绵羊吗？ C. 它们是小羊羔吗？（ ）2.Look at these gre
