题目内容

—Look! The line of people is ______.

—Bad luck. I don’t think we can get any tickets.

A.hopeless          B.helpless           C.endless           D.careless

 

【答案】

C

【解析】

试题分析:hopeless绝望的,不可救药的;helpless无助的,没用的;endless 无止境的,连续的;careless粗心的,淡漠的。句意:看人们的队伍是无止境的。——太倒霉了。我想我们买不到票了。结合语境可知选C。

考点:形容词辨析

点评:词义辨析考的是学生的基础词汇知识,了解每个选项的含义是做好此类题型的关键,需要注意的就是其一词多义现象及所修饰对象的不同,然后结合上下文语境选择合适答案。

 

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DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.
People have been trying to understand the human body for a long time, In1860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages . They’re written in the DNA with a special language.
In1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell﹙细胞﹚to build its parts. So far, scientists have found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word ”means, we can help to save people from several illness. So the more we understand, the more doctors will be able to do.
Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way, just to make people more attractive (有吸引力的),or stop sick people getting jobs.
【小题1】When did Mr Mendel discover why we look the same as other people in our family?
A. In 2000.     B. In 1961      C. In 1953     D In 1860
【小题2】What did the two scientists find in 1961? They found_____.

A.all the words in the DNA map
B.Small things called “genes” in our body
C.The first “word” they could understand in that language
D.those small parts are written in the DNA with a special language
【小题3】How can we help sick people if we understand more “words” in the DNA map?
A.Make better medicine.B.Make them get jobs.
C.Make maps for them.D.Make them attractive
【小题4】Which one is not true according to the article?
A.We look like our parents because of “genes” in our body
B.We have understand what all the words in the DNA map do
C.DNA is the whole “map” of the human body.
D.DNA tells the cell to build its parts.
【小题5】What do people think about this research about DNA?
A.It can be only badB.It can be only good
C.It can be good but won’t workD.It can be good and bad

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