-Oh.man!You didn't pass the Information Technology Exam again．You harder on it．一Yes.you are right．I will work hard from now on．( )A．can have studiedB．should have studiedC．might have studiedD．m 题目和参考答案——青夏教育精英家教网—

20．Is Dieting Ok for Kids？
You may know some adults and kids who worry about their weight and say they're going on a diet．You might wonder if you should be on a diet，too．（36）CWhy？Let's find out．
Dieting to Lose Weight
（37）EWhen someone diets to lose weight，the person is trying to eat fewer calories than the body uses．By doing this，the person may lose body fat and decrease his or her weight．Likewise，if a person eats more calories than the body uses，the person may gain weight．
Kids usually do not need to diet in this way．（38）BDuring this time，kids need a variety of healthy foods to keep their bodies growing properly．Some kids are overweight，but even overweight kids often can improve their health simply by eating nutritious foods and being more active．
（39）GBut kids may hurt their health even more by doing something drastic，like skipping meals or deciding to eat only lettuce．
Who Needs to Diet？
Though some people may feel they weigh too much or too little，there is no perfect body shape．Some people have larger frames （bigger bones） and will always look bigger and heavier than people with smaller frames．
（40）FYour doctor can examine you and check your body mass index （身体质量指数）．That's a way of estimating how much body fat you have．If the doctor is concerned about your weight，he or she can recommend a couple of goals：
for you to gain weight at a slower pace
for you to maintain your current weight
For some kids，the doctor may recommend losing some weight，but this should be done with the doctor's help．Kids who need to lose weight may visit with a dietitian who can explain how to reduce calories safely while still getting all the necessary nutrients．

A．It is important to form a good eating habit．
B．Unlike adults，kids are still growing and developing．
C．But most kids do not need to-and should not-diet this way．
D．Not eating properly can be very harmful to kids．
E．All foods and many drinks contains calories．
F．Talk to your doctor if you have questions about your weight．
G．Being overweight can cause health problems．

1．To tweet，or not to tweet？
A guide to the social networking/microblogging service Tewitter
SINCE its creation in 2006，Twitter，the social networking service，has taken cyber space by storm．At first glance it might seem like Facebook，but Twitter is in a league of its own，connecting people with fast-paced updates．It has become a place for activities，celebrities，businesses and everyday people to let others know about videos，opinions，interesting news，advertisements-and，yes what they are eating for lunch．
Twitter：n．a free social networking service that connects users through fast-paced status updates．Twitter-er：n．one who uses Twitter．Tweet：n．short updates or messages，of 140characters or less，wh ich are posted on your profile and sent to your followers．Retweet （RT）：n．unofficial Twitter feature that indicates a re-posting of a tweet from another user．Often uses the text RT@username （of the original source） before the post．Follower：n．one who receives another user's updates on his or her Twitter profile．Direct message：n．a private message sent from one Twitter-er to another．
The phenomenon includes a host of new vocabulary terms and concepts that every self-respecting Twitter-er should know．Here's a quick course on Twitter．
So you've finally been swept up by the techno-tide and gotten a Twitter account．But what to write？Who knew 140characters could be so overwhelming？
Darren Rowse of the TwiTip blog（www．twitip．com） recommends a two-step tweeting process：figure out what your follows want，and then give it to them．Some combination of cool links，conversation-starting quotes or questions，retweets and photos works well，Rowse writes．
Keep in mind that Twitter doesn't directly offer photo hosting．You will need to use a third-party site like TwitPic （www．twitip．com） to upload your photos．Other sites，like TwitVid （tweetdeck．com/beta） can be used to post videos．
If you th ink the Twitter Web Site too complicated，try a Twiiter client-Tweetdeck（tweetdeck．Com/beta） and the Mac-only Tweetie（www．stebits．com）are popular，and both also are available as iPhone apps（应用程序）．
Even without an iphone，you can update you Twitter on the go．After adding your phone number to your Twitter account，you can text updates to 40404（check Twitter's Web site for numbers to use outside the United States）But no matter how you tweet，remember that people can see what you post，and Twitter might not be the best place to complain about your boss，even if you make your Twitter private，your followers may not share your sense of discretion．
Twitter is crowded with celebrith accounts．The famous，who once avoided the media in their private lives，are posting everything on Twitter for all the cyber world to see，gathering followers in the millions．Who's leading the celebrity pack？TwitterCounter（www．twittercounter．com），a site that tracks the most popular Twitter users，lists Ashton Kuntcher and former fashion model，as the nost popular Twitter-er with，as of our publication date，2，691，112followers．
Title：To tweet，or not to tweet？

Introductionto Twitter	（71）Created/Launched/Originated/Started in 2006，twitter，the soclal networking service，has enjoyed（72）popularity/success/fame among the cyber world．
Basic Twitter（73）terms/vocabulary/terminology	●twitter ●twitter-er ●tweet ●retwwet
（74）recommendation（s）/advice to tweet your tweets	●Follow a two-step tweeting process，according to the （75）Tips/Hints/How/Ways of Darren Rowse． ●Use a third-party site to upload your photos and post videos． ●Try Twitter clients to help you （76）use/with/understand Twitter，among which the Tweet-deck and the Mac-only Tweetie are well （77）receive． ●Add your phone number to your Twitter account if you don't have an iPhone． ●Be（78）cautious/careful/watchful/mindful of what you post even if your twitter is made private
Celebrity twitter-ers	Celebrties now are （79）crazy/wild/enthusiastic/keen/mad about tweeting，among whom Ashton Kutcher is the most popular，（80）followed/watched by the largest number of twitter users．

18．Which of the following sentences conveys a fact？（　　）

	A．	Mary and her son must be home by now．
	B．	Careless reading must give poor results．
	C．	It's getting late，and I must leave now．
	D．	He must be working late at the office．

5．--Let's go out for a walk after dinner，OK？
---_______．I'd like to take a fresh breath．（　　）