[00:07.354]Unit 2 It's a black dog .它是一只黑狗。
[00:16.985]It's a black dog. 它是一種黑狗。  Now, it's a blue dog. 現(xiàn)在它是一只藍(lán)狗。
[00:24.030]It's a red cat.  它是一只紅貓。     Now, it's a green cat.現(xiàn)在它是一只綠貓。
[00:31.529]It's a yellow cap. 它是一頂黃帽子。Now, it's a red cap.  現(xiàn)在它是一頂紅帽子。
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