题目内容

17．It is difficult            a best friend．（　　）
A．to findB．findingC．findD．to be found

分析 找最好的朋友很难．

解答 答案是A．本题考查动词不定式做状语．英语中做表语和补语的形容词后往往接动词不定式做状语，并且用主动形式表示被动的含义；故本句中做表语的形容词difficult后面需要的是动词不定式to find，答案是 A．

点评 先判断选项中的动词在句中是以谓语还是非谓语形式出现，然后根据选项在句中的功能结合非谓语的基本用法做出合理的判断．要关注常见非谓语动词的搭配．

练习册系列答案
相关题目
7．Sitting for more than three hours a day can decrease a person's life expectancy（预期寿命）by two years，even if her or she is physically active and gets rid of （摆脱）dangerous habit like smoking，according to a study．Watching TV for more than two hours a day can worsen that problem，decreasing life expectancy by another 1.4 years．
The analysis comes just two years after Australian researchers found that people who said they watched TV for more than four hours a day were 46% more likely to die of any cause than people who said they spent less than two hours a day watching TV．Those watching TV more than four hours a day were also 80% more likely to die of cardiovascular （心血管的） disease．"Long-sitting behavior is something we need to take note of beyond telling people to get 30 minutes of activity a day，"said Peter T．Katzmarzyk，one of the lead researchers．But while the evidence of illnesses is increasing，it remains difficult for many people to find time to get on their feet，especially if they do desk jobs．
"Try to stand as much as you can，"Dr Katzmarzyk said．"Typically when you are on the telephone you can stand and use the speakerphone．Instead of e-mailing someone in the office，just get up and so to talk to them．"However，Dr Katzmarzyk added，standing shouldn't be alternative to exercising，but an alternative to sitting．"Several studies show that when you're sitting，your leg muscles are completely inactive，"he said．"When you're sitting and completely inactive，this is when you run into trouble managing blood sugar．"
25．What is the main idea of the first paragraph？C
A．Watching TV too long can worsen our mental health．
B．We should be active and give up smoking．
C．Sitting for too long a time can shorten one's life．
D．Smoking too much can be harmful to health．
26．The  researchers draw the conclusion of the effect of long-sitting behavior byA．
A．making comparisons（比较）          
B．listing figures
C．giving examples                   
D．classifying facts
27．What does  Dr Katzmarzyk think of long-sitting behavior？B
A．It warns  people to exercise 30 minutes a day．
B．It's a bad behavior worth considering seriously．
C．It can lead to death at once．
D．It is good for desk job workers．
28．According to Dr Katzmarzyk，if you are sitting all the time，you mayD．
A．phone your friends and talk about your problem
B．put on weight quickly and become more  inactive 
C．want to have more sugar for your meals
D．find it hard to keep your blood sugar proper．
8．Theintroduction（展示，介绍） will give you some information about Realcine．
5．She's kind and patient，and she explains English grammarclearly（如此清楚以至于）even I can understand it!
12．My name is Zhu Fei and I am speaking in favour of the Internet-I believe that the Internet has positive effects on our lives．There are two main points which must be included when we analyse the Internet．The first is its value for people （61）who/that are looking for information．那些正在寻找信息的人．The second is our ability to relate to others through the Internet．
（62）When people need information．当人们需要信息的时候，from the news and weather forecasts to travel packages and academic research，the Internet is now the first source they turn to．（63）轻按键盘键或点击鼠标．With the touch of a button or the click of a mouse，a student will find abundant information from the largest libraries and museums in the world at his or her command．A recent survey conducted in the USA shows that 80 per cent of Internet users employ it mostly to search for answers to questions．The second most common use of the Internet，for 79 per cent of Internet users，is to find out information about hobbies．（64）这些数据证明收集信息是人们使用网络的主要目的．These statistics prove that gathering information is the primary use for the Internet．
Another truly wonderful aspect of the Internet is the way people use it to build social bonds．One of the greatest benefits of Internet friendships is that they are based on common interests，rather than appearance or age．（65）没有网络，这些人与人交往的途径就会更少．Without the Internet．these people would have fewer avenues to meet people．For these reasons，I believe the Internet is a positive tool that helps make our lives better．
2．-Do you know why the teacher asks for me？
-He wants you to ______ your absence last night．（　　）
A．set offB．settle downC．watch outD．account for
9．-I think you look very nice in the red jacket．
-_______．（　　）
A．Oh，no．I don't look nice at all．
B．I don't like red color but my mom made me wear it．
C．I'm glad you think so．
D．You are very kind．
6．Tom had learned for a year before hetook up（开始学）Spanish．
7．-Make sure that the lights are off before leaving．
-____．I'll turn them off．（　　）
A．It dependsB．You can forget it
C．Got itD．Don't mention it

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