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[00:00.00]恒星英语学习网 Unit 3
[00:05.98]Those are boats.
[00:10.14]Activity 1
[00:15.99]Listen and repeat.
[00:21.55]This is a duck.
[00:25.91]These are ducks.
[00:33.15]That is a boat.
[00:39.92]Those are boats.