按要求完成下列各题。
1. tigers/ are/ the/ jumping (.) (连词成句)
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2. Lingling/ doing/ what/ is/ now (?)(连词成句)
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3. are/ singing/ and/ the/ girls/ dancing (.)(连词成句)
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4. The elephant is drinking water.(对划线部分填空)
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5. The boys are playing football. (变一般疑问句)
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