[00:00.00] Unit 2 第二单元 My mummy is a duck. [00:07.55]Activity 2 活动二 Chant. [00:17.63]Woof,woof,woof.My mummy is a duck. [00:22.80]Woof,woof,woof.Quack, quack,quack. [00:26.54]My mummy is a duck. Quack, quack,quack. [00:31.66]Activity Bo...