题目内容

6．The girl was back home out of breath．She ________ have run all the way．（　　）
A．has toB．willC．mustD．need

分析 这个女孩回家上气不接下气．她肯定是一路跑回家的．

解答 答案是C．本题考查must表示推测的用法．has to 不得不；will会；need 需要．must准是，一定是，表示推测只能出现在肯定句中，表示有客观依据的推测．本题中由上文的客观依据"out of breath"，推测"她肯定是一路跑回家的"，所以答案是C．

点评 要在正确理解情态动词的基本含义的基础上，整体理解语境中的情感态度，做出合理的判断．

练习册系列答案
相关题目
3．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．每处错误仅涉及一个单词的增加、删除或修改．
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写出修改后的词．
注意：1．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分
Meimei likes reading books．She often goes and borrows books from the school library．Though she likes reading，but she doesn't take care of her books．She threw them everywhere，on the table，on the ground，and even under her bed．Her roommates often remind her this．But she turns a deaf ear to them．The bad habit didn't bring him great trouble until yesterday．It was the deadline for two book．She looked everywhere in the room．Twenty minutes past but she still failed to find them．Meimei cried helpless．It was four thirty and Meimei had to go to the library，for it closed at five．She told a story to the librarian and asked for an extra day in tears．Looked at her in surprise，the librarian said，"How a careless girl!You returned them yesterday．Don't you remember？"
17．Some colors people see late at night could cause signs of clinical depression．That was the finding of a study that builds on earlier study findings．They show that individuals who live or work in low levels of light overnight can develop clinical depression．Doctors use the word"clinical depression"to describe severe form of depression．Signs may include loss of interest or pleasure in most activities，low energy levels and thoughts of death or suicide．
In the new study，American investigators designed an experiment that exposed hamsters（仓鼠）to different colors．The researchers chose hamsters because they are nocturnal，which means they sleep during the day and are active at night．
The animals were separated into four groups．One group of hamsters was kept in the dark during their night-time period．Another group was placed in front of a blue light，a third group slept in front of a white light，while a fourth was put in front of a red light．
After four weeks，the researchers noted how much sugary water the hamsters drank．They found that the most depressed animals drank the least amount of water．
Randy Nelson heads the Department of Neuroscience at Ohio State University．He says animals that slept in blue and white light appeared to be the most depressed．"What we saw is that these animals didn't show any sleep uneasiness at all but they did mess up biological clock genes and they did show depressive sign while if they were in the dim（微弱）red light，they did not．"
Randy Nelson notes that photosensitive（感光）cells in the eyes have little to do with eyesight．He says these cells send signals to the area of the brain that controls what has been called the natural sleep-wake cycle．
He says there's a lot of blue in white light．This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness．

25．Researchers use hamsters in the experiment becauseD．
A．they are similar to humans in dealing with colors
B．they are easy to observe and study
C．they are sensitive to colors like human beings
D．they are active at night and sleep during the day
26．What sign shows that the hamsters are being depressed？A
A．They drink less sugary water．
B．They don't sleep well．
C．Their eyesight becomes worse．
D．Their energy level becomes low．
27．Ctends to cause hamsters to be depressed．
A．Dim light 
B．Red light
C．Blue light 
D．Darkness
28．What can help people who work late at night to avoid being depressed？B
A．Not being exposed to dim red light when using computers．
B．Equipping their computer screens to put it more in the reddish light．
C．Living or working in low levels of light overnight．
D．Going to see doctors of clinical depression regularly for help．
14．-How old are you，madam？
-If you _________ know，I am twice my son's age．（　　）
A．wouldB．mustC．canD．should
1．When we were young，every winter evening my sisters and I _______ stay by the fire，enjoying my grandmother's telling moving stories．（　　）
A．wouldB．mightC．shouldD．could
11．-I don't mind telling you what I know．
-You _____．I can manage it myself．（　　）
A．mustn'tB．ought not toC．can'tD．don't have to
18．---What sort of house do you want to have？Something big？
---Well，it ______ be big--that's not important．（　　）
A．mustn'tB．needn'tC．can'tD．won't
15．The last few years _________many disasters in and out of Cl1ina，from earthquake to drought．（　　）
A．seeB．are seeingC．have seenD．saw
16．You cannot walk （not walk） on the grass．

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网