(C)
①A tree has roots. People have roots too. If you get to the root of a problem, you will solve it. It’s the same thing with words. Dig deeply into a big, unfamiliar word and you will understand where it came from.
②As readers, especially those reading in a second language, we need to deal with the text as if we were detectives(侦探) looking for information to unlock the unknown. Like any good detective arriving on the crime scene, the first thing to do when meeting a new and difficult word is to judge the situation, to look at everything that is known and see if it helps us to understand what it means.
③ As you know, prefixes(前缀) and suffixes(后缀) can be added to the beginning or the end of words to change the meaning. Know them, and you will have the word building power. But root words are the key. Take time to learn a few of these, put them in your memory, and you will become a master word detective.
④Let’s look at one common root word used in English. “Alter” from the Latin word means “other”. When you meet this root word, you know that the bigger word has something to do with “other”. Examine the word “alternate”. Can you find the Latin root in it?
·If you and your friend like to eat out, first you pay and the other pays the next time. You are alternating paying.
·If you go to the movies on alternate Saturdays, you go on one Saturday, but not the other Saturday.
·If you have no alternative, you have no other choice.
⑤Learn as many root words as possible in the language you are studying. Then use your “rooting for words” skills. Like any new skill, practice and hard work are always paid back.
根据短文内容，选择最佳答案。(5分)
()66. What does the underlined word “it” in Paragraph 2 refer to?
A. The situation.
B. The crime scene.
C. A new and difficult word.
D. Everything that is known.
()67. If Jim and Lily go to the movies, which one below is “alternating paying”?
A. They each pay half.
B. Jim pays every time.
C. They take turns in paying.
D. Their parents pay for them.
()68. How does the author explain his ideas about root words?
A. By giving a fact.
B. By taking an example.
C. By telling a story.
D. By having a discussion.
()69. “Sen” from the Latin word means “old”. Which word uses this Latin root?
A. My brother is my senior by two years.
B. He was ill so he was absent from school.
C. A criminal was sentenced to death by law.
D. 60 students were present at the sports meeting.
()70. Which of the following shows the structure(结构)of the passage?
(①=Paragraph 1 ②=Paragraph 2, ...)

A.
B.
C.
D.

66.C 67.C 68.B 69.A 70.B

【分析】
首先通读全文，梳理各段大意：①段以树的根类比，引入词根对理解单词的重要性；②段说明第二语言阅读时，遇到生词需像侦探一样找信息理解；③段强调前缀、后缀及词根的作用，指出词根是关键；④段以词根“alter”为例，说明其含义及在单词中的应用；⑤段总结应多学习词根并练习。针对各题：66题是代词指代题，定位第二段分析代词指代对象；67题是细节题，定位第四段找“alternating paying”的对应例子；68题是写作手法题，判断作者解释观点的方式；69题是词汇含义题，结合词根“sen”的含义分析选项；70题是语篇结构题，梳理段落逻辑关系匹配对应结构图。
【解析】
66题：定位第二段，画线词“it”所在句前文提到“when meeting a new and difficult word”，结合语境可知，“it”指代“a new and difficult word”，故选C。
67题：定位第四段中“alternate paying”的例子，原文说明“alternating paying”是轮流付钱，对应选项C“take turns in paying”，故选C。
68题：作者通过列举词根“alter”的含义及相关单词（alternate、alternative）的实例来解释词根的作用，属于举例说明，故选B。
69题：词根“sen”意为“old”，选项A中“senior”表示“年长的”，符合该词根含义；B“absent”（缺席）、C“sentenced”（判刑）、D“present”（出席）均不涉及“old”，故选A。
70题：梳理段落结构：①段总起引入词根的重要性；②段讲阅读时处理生词的方法；③段强调词根的关键作用；④段举例说明词根用法；⑤段总结学习词根的方法。对应选项B的结构（①为中心，连接②③组和④⑤组），符合段落逻辑，故选B。
【答案】
66.C 67.C 68.B 69.A 70.B
【知识点】
代词指代；细节理解；写作手法；词汇含义；语篇结构
【点评】
本题为英语阅读理解题，综合考查学生对文章细节、代词指代、写作手法、词汇含义及语篇结构的理解能力，需学生精准定位原文信息、梳理逻辑关系，整体难度中等。
【难度系数】
0.5