Listen and choose. 仔细听,选出你听到的单词。   
(     )1. I like the duck.
(     )2. My cow is black and white.
(     )3. Li Ming's pig is very big.
(     )4. I have thirteen chickens.
(     )5. We have a farm.
1. duck     2. cow     3. pig     4. chickens     5. farm
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