根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided.   66 

Write it out

   You can also check a math problem by writing everything out on paper.   67   Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.

 68 

 Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.

Plugging in

    You may find that a variable(变量) isn’t good enough or have a problem where you have to solve for a variable.   69   This is the only real way to assure yourself that the answer you’ve found is correct.

Check for a reasonable answer

       70   For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.

A. Do the opposite

B. Correct the answers

C. Plug the variable in the equation (方程) to check it out.

D. Therefore you’ll improve your grades, as well as your math skills.

E. It also helps you to figure out everything after you have already finished the test.

F. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.

G. This helps you to know what information you have and what information you need to solve.

二、完型填空（共20小题；每小题1分，满分20分）
阅读下面短文，掌握其大意，然后从41—60各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
When I was twelve years old, my family were the first black people to move into an all-white part of Grand Rapids, Michigan．Many of our new __16  weren’t very welcoming．Some of the adults said __17   that we should return where we came __18 ．The children sometimes threw stones at me or drove me home from __19 ．
Most of my teachers __20   took no notice of me, but not Dorothy Bean, my history teacher．Miss Bean was angry at how badly I was being __21  ,but she didn’t say this to me．Miss Bean __22   her respect for me by teaching me just like __23   else．Instead of being unnoticed, I was given a __24   to show that I was smart．Miss Bean was the first teacher who ever made me __25? myself．She insisted on knowing what I thought about difficult questions．Was Thomas Jefferson __26   to buy Louisiana from France?__27  ?She expected me to have an opinion and to be able to __28   it up．Miss Bean was teaching me that thinking for yourself was the real key to __29 ．
One day, when I was not paying attention in class, Miss Bean suddenly __30   an eraser at me．Unbelievably, the eraser hit me right on the hand and __31   my pencil flying．The whole class was __32  at first, then started laughing．This incident became famous in the school and,__33   it happened to me, the students wanted to get to __34   me．So that's the story of how Dorothy Bean made me her target, and how I became just another __35  in school．
16．A．friends             B．schoolmates       C．teachers            D．neighbors
17．A．kindly       B．surprisingly       C．angrily            D．happily
18．A．to                 B．from            C．for               D．in
19．A．school       B．street            C．office             D．downtown
20．A．hardly       B．simply           C．never              D．only
21．A．taught       B．considered              C．welcomed          D．treated
22．A．kept         B．expected          C．showed             D．refused
23．A．anyone       B．anywhere         C．someone            D．wherever
24．A．question      B．chance           C．test               D．place
25．A．worry about  B．look about        C．work for           D．think for
26．A．necessary     B．important         C．right              D．known
27．A．How        B．Where           C．When             D．Why
28．A．back         B．set              C．put               D．give
29．A．respect        B．education          C．friendship         D．children
30．A．aimed        B．threw             C．passed            D．found
31．A．sent         B．left               C．made             D．sprang
32．A．excited       B．frightened         C．moved            D．shocked
33．A．so           B．then             C．because            D．whether
34．A．ask           B．know            C．praise             D．understand
35．A．kid           B．problem          C．friend            D．example

根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Are Societies Ageing Too Fast?

       An ageing society is one in which the population of people over the age of 60 is increasing．The global population at present is about 6 billion with 1 person in every 10 aged 60 or above．_．This will mean that for the first time in human history the population of older persons will be larger than the population of children! What are the causes of this population change?

       _．And another is that birthrates have dropped as people, especially women, are educated．Measures to slow population growth like China’s one-child policy, have also contributed to lowered birthrates．The increase in the aged population is not just an interesting trend, however; it also has severe implications for the future of global economies．

       People traditionally retire at 65 and live on government pensions．_．Another concern is that as medical expenses increase with age, the demands of the growing aged population will eventually cause medical systems to face bankruptcy（破产）．

       ___．They suggest that because people are living longer, they ought to work longer, while governments need to establish a sound social security system．They also suggest that individuals start saving as soon as possible to ensure a financially secure retirement．People should also develop good health habits in their youth to ensure an active and productive old age．__．By finding cures for diseases like Alzheimer’s and cancer, medical bills and the need for care would be drastically reduced．

       Finally, an important step to ensure a bright future for all is to do away with negative stereotypes that see valuable members of society only as pensioners or patients．It’s high time we stopped seeing ageing as a disease and started playing our parts in securing the future of our ageing societies．

A. Due to ageing problem, cities are facing more challenges．

B. Experts insist that steps should be taken now to prepare for the future．

C. As people grow older, a huge financial burden will be placed on the government．

D. Biomedical research is another tool we can use to deal with the problems of ageing societies．

E. One reason is that dramatic health advances have added 20 years to the average life-expectancy．

F. The United Nations projects that by 2050, it will be 1 in every 5．

G. As is known to all, good habits lead to good health．

I believe that families are not only blood relatives, but sometimes people who show up and love you when no one else will.

In May 1977, I was living in a Howard Johnson’s motel off Interstate 10 in Houston. My dad and I 21 a room with two double beds and a bathroom which was too 22 for a 15-year-old girl and her father. Dad’s second marriage was 　23 and my stepmother had 　24 us both out of the house the previous week. Dad had no　 25_ what to do with me. And that’s when my other family 　26 .

Barbara and Roland Beach took me into their home 　27　 their only daughter, Su, my best friend, asked them to. I 　28 with them for the next seven years.

Barb washed my skirts the same as Su’s. She 　29 I had lunch money, doctors’ appointments, help with homework and nightly hugs. Barbara and Roland attended every football game where Su and I were being cheerleaders. 30 I could tell, for the Beaches there was no 31 between Su and me; I was their daughter, too.

When Su and I 32 college they kept my room the same for the entire four years I attended school. Recently, Barb presented me with an insurance policy they bought when I first moved in with them and had continued to pay on for 23 years.

The Beaches knew 33 about me when they took me in – they had heard the whole story from Su. When I was seven, my mother died and from then on my father relied on other people to _34 his kids. Before I went to live with the Beaches I had believed that life was entirely 　35__ and that love was shaky and untrustworthy. I had believed that the only person who would take care of me was me.

36 the Beaches, I would have become a bitter, cynical (愤世嫉俗的) woman. They gave me a(n) 37 that allowed me to grow and change. They kept me from being paralyzed(使瘫痪 ,使麻痹 ,使无能力)by my _38　 , and they gave me the confidence to open my heart.

I 　39 family. For me, it wasn’t the family that was there on the day I was 　40　 , but the one that was there for me when I was living in a Howard Johnson’s on Interstate 10.

16．A. lived　　 B. shared 　　 C. possessed　　　　 D. bought

17．A. cheap　　 B. noisy　　　 C. small　　　　　　 D. limited

18．A. in trouble B. in sight 　　 C. in place 　 D. in parts

19．A. struck　　　　 B. removed　 C. kicked 　　 D. knocked

20．A. plan　　　　 B. choice 　　　 C. chance 　　 D. idea

21．A. looked after　 B. showed up　　 C. turned over 　　 D. came cross

22．A. so　　　　　 B. because　　　 C. until 　　　　 D. while

23．A. worked　　　 B. traveled　　　 C. lived 　　　　 D. learned

24．A. worked out　　 B. called up　　 C. watched out　　　 D. made sure

25．A. As long as B. As far as　　 C. As soon as 　　　 D. As many as

26．A. change 　　 B. problem 　 C. conflict 　 　　D. difference

27．A. set off　　　　　 B. left for　　　　 C. entered into 　　 　　　 D. admitted into

28．A. all 　　 B. little 　 C. something D. nothing

29．A. supply B. teach C. encourage D. raise

30．A. different 　 B. unfair 　　　 C. easy　　 　　　 D. hopeful

31．A. Thanks to B. In spite of C. Except for 　　　 D. But for

32．A. home 　　　 B. house 　　　 C. ability 　　　 　　D. lesson

33．A. choice 　　 B. failure 　　　 C. past　 　　 　　D. present

34．A. doubt about 　　 B. call on 　　 C. center on　　 D. believe in

35．A. born B. accepted 　 C. educated　　 D. deserted

阅读下面短文，掌握其大意，然后从46-65各题所给的四个选项（A、B、C、D）中选出最佳选项。
Several days ago, I met a stranger in the street who stopped and asked me directions. I   36  to show him the way to the destination（目的地），but to my   37  he coldly refused my offer. I asked him why. Finally he told me that he was  38  I would ask him for money if I   39  him in this way.
Money! I   40 deep into thought. Is it money that comes between us? Money itself has no   41 ; yet it cannot simply be   42 to be good or bad. The problem  43  what attitude we have towards it.
At present, we have a more   44  material life than before, but we’re becoming more and more 45 . Why? In my opinion, the   46  is the change in people’s personal   47 . They wrongly believe that   48 money should be their only aim in life, so they   49  all sorts of ways they can to  50 this aim.
They are afraid of being   51  and fooled. If everyone acts like this, what will our  52 be like?
Needless to say, money is becoming more and more important in our society,   53  it shouldn’t be the “be-all and end-all” of life. If a person only concentrates on  54 , he will be lonely and void(空虚).
It is up to us to make our lives happy, not money. We should try our best to help others   55  and freely. If everyone does so, our society will be better and better.