改错题。

     After shopping, Mother and I went to a restaurant for lunch. I notice Mother looking at a nearby table

occupy by an elderly woman and young couple. They are silently, and it was clearly that things were not

going well. As we left, Mother stopped on their table. "Excuse me," she said, put her arm around the

unhappy old woman. "You remind me so many of my mother. May I hug (拥抱) you?" The woman smiled

happily as she accepted to it. After we left, I said, "That was very nice of you, Mother. So I didn't think she

looked like Grandma." "Neither did me." said Mother cheerfully.

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下列疾病中不属于遗传病的是……………………………………（   ）　　　　　　　　

A．艾滋病　

B．白化病

C．先天性唇裂

D．色盲