A． a wonderful cook B． a responsible doctor C． a warm﹣hearted teacher D． a hardworking student 15．（6分）
Blue Lightning
Sally loved cars more than anything else． This spring she thought of building a go﹣kart to enter for the Go﹣Go Race． So she asked her dad for help．
\，\． \： you do some research first and then come back to me with a design．\
A week later， Sally brought her notes and drawings to Dad． She named her go﹣kart \． Dad looked over her work， thinking． \， that's interesting，\said． \． Just build Blue Lightning as you've designed．\
Over three weekends of hard work， Sally turned her design into a real， working go﹣kart and painted it light blue． Dad asked her to take it for a test drive． Sally agreed． After she did that， Sally drove back to Dad． \，\． \wanted me to have a test drive．\
\， do you？\． \．\
\， there was a lot of pushback，\． \lightning bolt （闪电） shape．\ \．
\， why didn't you tell me about that problem in the first place？\． Dad laughed． \the fun in that？ If you give a man a fish， he'll eat for a day． But if you teach a man to fish， he'll eat for a lifetime．\ Sally said， \． Anyway， designing is half the fun !\
Dad smiled． \． Sometimes， learning happens during the process． We learn how to do something right by doing it a few times first and making mistakes along the way．\ That encouraged Sally and she worked even harder． When she showed Dad her new go﹣kart， he nodded with pride．
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Finally came the race． Sally wasn't worried about whether she would win﹣in her mind， she had already won， by building something better than ever before．
（1）Sally thought of building a go﹣kart to ． A． practice driving B． enter for a race C． play with friends D． do some research
（2）What did Sally's dad ask her to do after she built the go﹣kart？ A． To have a test drive． B． To take a good rest． C． To give it a cool name． D． To paint it light blue．
（3）Sally's story mainly tells us that ． A． winning a race is important B． fishing brings us a lot of fun C． driving experience is necessary D． learning happens during the process
16．（6分）Sometimes it seems that time is flying． Perhaps it doesn't need to feel this way． Our experience of time can be possibly changed． By understanding the psychological （心理学的） processes behind our different experiences of time， we might be able to slow down time a little．
One basic law of psychological time is that time seems to slow down when we're exposed（接触） to new environments and experiences． The law is caused by the relationship between our experience of time and the amount of information our minds process． The more information our minds take in， the slower time seems to pass．
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It follows， then， that we have different experiences of time in different situations． In some situations， our life is full of new experiences． Our minds process a lot of information and time seems to slow down． In other situations， we have fewer new experiences and the world around us becomes more and more familiar（熟悉的）． We become insensitive to our experience， which means we process less information， and time seems to speed up． How can we slow down time？ Here are two suggestions．
Firstly， since we know that familiarity makes time pass faster， we can expose ourselves to as many new experiences as possible． We can give ourselves new challenges， meet new people， and expose our minds to new information， hobbies and skills． This will increase the amount of information our minds process and expand （增加） our experience of time． Secondly， and perhaps most effectively， we can give our whole attention to an experience﹣to what we are seeing， feeling， tasting， smelling or hearing． This means living through our senses rather than through our thoughts． For example， on the way home， focus your attention outside of yourself， instead of thinking about the problems you have to deal with． Look at the sky， or at the buildings you pass， traveling among them． This open attitude to your experiences helps take in more information and also has a time﹣expanding effect．
To a certain degree， we can understand and control our experience of time passing． It's possible for us to slow down time by expanding our experience of time．
（1）According to the writer， we can expand our experience of time by ． A． going to bed on time B． traveling to new places C． having dinner as usual D． printing the same materials
（2）What can we learn from the passage？
A． Being familiar with the world around helps us get more information． B． Understanding psychological time makes life pass more quickly． C． We can take in more information by living through our senses． D． We should build a stronger relationship between time and us．
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（3）Which of the following would be the best title for the passage？ A． Slow Down Time B． Only Time Will Tell C． Race Against Time D． Time Will Not Come Twice 17．（8分）
How Much Can We Afford to Forget？
In 2018， Science magazine asked some young scientists what schools should teach students． Most said students should spend less time memorizing facts and have more space for creative activities． As the Internet grows more powerful， students can access （获得） knowledge easily． Why should they be required to carry so much of it around in their heads？ Civilizations（文明）develop through forgetting life skills that were once necessary． In the Agricultural（农业的）Age， a farmer could afford to forget hunting skills． When societies industrialized， the knowledge of farming could be safe to forget． Nowadays， smart machines give us access to most human knowledge． It seems that we no longer need to remember most things． Does it matter？
Researchers have recognized several problems that may happen． For one，human beings have biases（偏见），and smart machines are likely to increase our biases． Many people believe smart machines are necessarily correct and objective，but machines are trained through a repeated testing and scoring process．In the process， human beings still decide on the correct answers．
Another problem relates to the ease of accessing information． When there were no computers， efforts were required to get knowledge from other people， or go to the library． We know what knowledge lies in other brains or books， and what lies in our heads． But today， the Internet gives us the information we need quickly． This can lead to the mistaken belief﹣the knowledge we found was part of what we knew all along．
In a new civilization rich in machine intelligence， we have easy access to smart memory networks where information is stored． But dependency on a network suggests possibilities of being harmed easily． The collapse of any of the networks of relations our well﹣being（健
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