每日一道中考題：閱讀理解C篇

Journey of a thousand miles begins with single step.

千里之行，始於足下。

答題時間：

2017年江蘇省蘇州市英語真題（閱讀理解C篇）

Do you have brown hair？Are you taller than other kids your age？These characteristics were decided before you were born．You got yourtraitsfrom your parents.They passed their traits on to you through genes （基因）.

Genes carry codes （代碼） for blue eyes or brown eyes．Genes say how tall you will get and what color hair you will have．You got half of your genes from your mother．You got half of your genes from your father．So you have your own set of genes．Each person gets different genes for each body part．That is why you look like but not exactly like your brother or sister．

A dominant （顯性的）gene shows up most of the time．Brown eyes are dominant over blue eyes．A recessive （隱性的） gene shows up less often．Light hair comes from a recessive gene．Dark hair is more common．Look at the eye color and hair color of the people around you．You will see that this is true．

Genes help to make you who you are．But they don t tell the whole story．Your genes may help you to be fast and strong．But you still need to learn how to run or swim or skate well．

31．The underlined word"traits"in Paragraph 1means ．

A．charactcristics

B．expericnces

C．achievements

D．possibilities

32．According to Paragraph 3，you can see most of the people around you have ．

A．brown eyes with dark hair

B．brown eyes with light hair

C．blue eyes with dark hair

D．blue eyes with light hair

33．What is the passage mainly about？

A．Genes carry codes for eyes and hair．

B．Genes help to make you who you are．

C．Genes help you to be fast and strong．

D．Genes make brothers look similar．

【文章大意】

本文主要介紹的是基因和性狀之間的關係。作為一個人，有一半的基因來自於父親，有一半的基因來自於母親，有的基因是顯性的，比如黑色的頭髮和棕色的眼睛，所以性狀比較常見，有的是隱性的，如藍色的眼睛，性狀比較少見。

【答案與解析】

31．A 詞義猜測題，文中提到"They passed their traits on to you through genes"父母的traits通過基因遺傳給後代，我們知道，通過基因遺傳的是性狀，所以traits應該是個性、顯著的特點的意思，由此確定選擇A。

32．A 推理判斷題，文中提到"Brown eyes are dominant over blue eyes．Dark hair is more common"控制棕色眼睛性狀的基因是顯性基因，黑髮更為普遍，由此我們可以知道眾人中常見的性狀是黑髮，棕色的眼睛，選擇A。

33．B 主旨大意題，文中提到"Genes help to make you who you are"基因使得你成為獨一無二的，並且文章通篇都在介紹基因和性狀之間的關係，由此確定答案為B。

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