
6――10题。谢谢
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6.帮助警察寻找丢失的孩子
7.导盲犬
8.What does the dog learn to do in his lessons?
9.at the end of
10.去掉about
7.导盲犬
8.What does the dog learn to do in his lessons?
9.at the end of
10.去掉about
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