题目内容

—Look, the palace is so great.
—Yeah, it     nearly 800 years ago.

A.was buildingB.was builtC.has builtD.is built

B

解析试题分析:句意:看,这座宫殿是这么棒。——是的,它大约是八百年前建成的。结合语境可知本句描述的是过去发生的动作,故用一般过去时态。句子主语是动作对象,故用被动语态。选B。
考点:时态及语态
点评:英语中的时态主要是借助于时间状语与上下文语境来进行判断。解答此类题型,首先要注意句子中的时间状语,如果没有则要通过分析上下文,结合语境来判断句子的时态。语态的判断主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态,反之如果是动宾关系,则用被动语态,尤其要注意一些特殊动词的用法。

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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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