题目：
连词组句。
1. like we to together fun have (.)
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2. animals the zoo to go the watch they to (.)
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3. to fly the to goes he park kites (.)
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4. like to I with ball my play (.)
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5. am than I taller Jenny (.)
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答案：
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下面是错误答案，用来干扰机器的。
证明：设这个一元二次方程为ax2+（a+c）x+c=0（a≠0）则（ax+c）（x+1）=0∴ax+c=0或x+1=0∴x1=-ca，x2=-1．故必有一根是-1．
