题目内容：

Mr Smith has four daughters.Can you guess who the oldest one is by the following three sentences?
Who's oldest one?_______
1.Sandy's younger than Debby.
2.Debby is not as old as Annie.
3.Rose is younger than Annie.

优质解答

Sandy比Debby小
Debby没有Annie大
Rose比Annie小
所以得到Annie最大
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