【题目】阅读理解。
Helen: What can you do, Yang Ling?
Yang Ling: I can sing. And I can dance. Can you sing Chinese songs, Helen?
Helen: No, I can’t. But I can play the piano. And my mother can play the piano, too.
Yang Ling: What can Mike do? Can he play the piano?
Helen: I don’t think so. But he can play the guitar.
Yang Ling: Oh, my friend Gao Shan can play the guitar, too. He learns how to play the guitar from his father.
Helen: How about David and his sister, Nancy? What can they do?
Yang Ling: David can ski and skate very well. Nancy can skate but she can’t ski. They and their parents often go skating on Sundays.
Helen: The family all like skating, right?
Yang Ling: Yes, they do. Look, Liu Tao is coming. What can he do?
Helen: Liu Tao is very quiet(安静). He can make a model plane.
Yang Ling: He’s a clever boy.
阅读对话，回答问题。
1. What can Yang Ling do?
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2. Can Helen sing Chinese songs?
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3. Who can play the guitar?
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4. Can Nancy ski?
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5. What do David and his family often do on Sundays?
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6. What can Liu Tao do?
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