句型转换。
（1） We write Christmas cards to Wang Ling. (对画线部分提问)
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（2） Danny bought a star yesterday. (对画线部分提问)
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（3） This is a Christmas card. (变为复数句)
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（4） Are you going to send a card? (作否定回答)
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（5） I can write my card. (改为一般疑问句)
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