课前热身

Old MacDonald

Old Macdonald had a farm. E-I-E-I-O. And on that farm he had some ducks. E-I-E-I-O. With a quack quack here and a quack quack there. Here a quack, there a quack. Everywhere a quack quack. Old Macdonald had a farm. E-I-E-I-O.

　Let's sing