20．根據(jù)短文內(nèi)容按要求完成任務(wù)。
You have big eyes and a small nose.While your friend has small eyes and a big nose.What makes you and your friend look different？The answer is genes （基因）.Scientists found 15 genes deciding （決定） some of our facial features （面部特征）.Some of these genes can pass down from parents to children.That's why we often hear people say，"You are just a clone （克?。?of your mom，or of your dad."
But what facial features did you get from your mom？And what parts came from your dad？
Nose
The tip of the nose is the most （A） "
handed down" part.If one of your parents has a big nose，you are likely to have the same nose shape.
Chin
If one of your parents has a big chin （下巴），usually you have a big chin.
Skin color
One parent has a light skin color.The other parent has a dark skin color.Most of the time，you have a skin color in between.
No two faces are the same
Even twins don't look the same.Their looks are just very similar （相似的）.They can have some small differences.
任務(wù)一： （1）在文中找到并寫出與（A）處劃線部分意思相同的短語：
任務(wù)二：回答問題：
（2）What makes you look different from others？
（3）Why do people often say："you are just a clone of your mom，or of your dad"？
（4）How many facial features you get from your parents are mentioned （提及） in the passage？
（5）Is it right that one of Lily's parents must have a big chin if Lily has a big chin？
