There are 12 children in Lucy’s 13-year-old birthday party. They are from A， B and C three families， and there are 4 children in each family. Of course， Lucy is from one of the families. 在露西的13歲生日聚會(huì)上，共有12個(gè)小孩，并分別來(lái)自A、B、C三個(gè)不同的家庭，當(dāng)然，露西來(lái)自其中一個(gè)家庭。

Of the 12 children， they are less than 13 years old except Lucy. They are of different ages. 這12個(gè)孩子中，除了露西13歲外，其余的都不到13歲，而且每個(gè)孩子的年齡都各不相同。

From numbers 1-13， all of them stand for the ages of the children except one number. Add up all the ages of the children in the family， the results are as follows: 在1~13這13個(gè)數(shù)字中，除了某個(gè)數(shù)字以外，其余的數(shù)字都表示某個(gè)孩子的年齡。把每個(gè)家庭孩子的年齡加起來(lái)，得出以下結(jié)果：

A家庭(Family A): Total of the ages is 41， a 12-year-old child included. 年齡總數(shù)41，包括一個(gè)12歲。

B家庭(Family B): Total of the ages is 23， a 5-year-old child included. 年齡總數(shù)23，包括一個(gè)5歲。

C家庭(Family C): Total of the ages is 21， a 4-year-old child included. 年齡總數(shù)21，包括一個(gè)4歲。

提問(wèn)

Which family does Lucy belong to? 露西屬于哪個(gè)家庭？

key

Key： 露西屬于B家庭。A家庭的年齡組合為：8，10，11，12；B家庭的年齡組合為：5，13，2，3，；C家庭的年齡組合為：1，4，7，9