Free energy is everywhere around us. There are many ways to make and collect energy from various sources like sun, wind and water. People also realize that everyday stuff can be a source of energy too. For example, riding a bike, running or just walking, etc. We simply have to change our way of thinking if we want to change the world.
So comes the idea of solar roadways. Are they the road of future? Why use roads just for driving and collecting tolls (过路费)? Why don’t we use them for collecting energy?
The US Department of Transportation recently awarded $100,000 to Solar Roadways to build the first ever Solar Road Panel. So how do these future roads work?
The Solar Road Panels will contain embedded (嵌入的) LEDs which “paint” the road lines from beneath to provide safer nighttime driving as well as to give drivers instant instructions such as detour (绕行) ahead. The road will be able to sense wildlife on the road and can warn drivers to “slow down”. There will also be embedded heating elements in the surface to prevent snow and ice buildup, providing safer winter driving.
Replacing asphalt (沥青) roads and parking lots with Solar Roadway Panels will be a major step toward stopping climate change. Fully electric vehicles will be able to recharge along the roadway and in parking lots, finally making electric cars practical for long trips.
We just can’t wait to see more of these roads all over the world in the near future.
【小题1】The first paragraph serves as a(n)______.

第二节完形填空(共20小题；每小题l 5分，满分30分)
阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
Recently，I flew to Las Vegas to attend a meeting. As we were about to arrive，the pilot announced with apology that there would be a slight 2l     before setting down. High desert winds had   22   the airport to close all but one runway. He said that we would be   23   L the city for a few minutes waiting t0  24    We were also told to remain in our seats meanwhile with our seat belts fastened  25   there might be a few bumps(颠簸)．We11，that few minutes turned into about  four—five minutes，including a ride that would make a roller coaster(过山车)  26  by comparison
The movement was so fierce that several passengers felt  27   and had to use airsickness bags. As you might guess，that’s not good thing to have happen in a(n) 28    space because it only 29    to increase the discomfort of the situation.
About twenty minutes into the adventure，the entire airplane became very 30 .
There was now a sense of anxiety and fear that could be 31   noticed．Every passenger simply held on for dear life …except one. A  32  was having a good time! With each bump of the33!he would let out a giggle(咯咯的笑)of delight As I observed this，I 34     that he didn’t know he was supposed to be afraid and worried about his    35 He neither thought about the past nor about the future Those are what we grown—ups have learned from  36   .He was 37  the ride  because had not yet been taught to fear it. Having  understood this，I took a deep breath and   38  back into my seat，pretending I was   39   on a roller coaster. I smiled for the rest of the flight. I even  40    to  giggle once or twice ,much to the chagrin(随恼)of the man sitting next to me holding the airsickness bag.
21. A. mistake      B. delay       C. change         D. wind
22. A. forced       B. warned     C. swept           D. reminded
23. A. watching     B. visiting     C. circling          D. crossing
24. A. arrive       B. enter        C. stop           D. land
25. A. if           B. though      C. because         D. while
26. A. light        B. pale         C. easy           D. quick
27. A. sick         B. nervous     C. angry          D. afraid
28. A. empty       B. narrow      C. secret          D. open
29. A. happens      B. continues    C. fails           D. serves
30. A. quiet        B. hot          C.  dirty         D.  crowded
31. A. partly        B.  gradually   C. shortly         D. clearly
32. A. pilot         B. baby        C.  guard         D.  man
33. A. seats        B.  passengers    C. flight          D. airplane
34. A. realized      B.  hoped      C.  agreed        D.  insisted
35. A. health       B. safety        C.joy             D. future
36. A. teachers      B. books       C.  experience     D.  practice
37. A. learning     B.  taking      C.  missing       D.  enjoying
38. A. sat         B. lay          C. went            D. rode
39. A. nearly      B.  finally      C.  really          D.  suddenly
40. A. attempted    B.  managed     C.  wanted       D.  decided

In January 1986 I saw a show about cartooning called “Funny Business” on TV. I had always wanted to be a __36__but never knew how. So I wrote to the host of the_37_, cartoonist Jack Cassady, asking for advice on entering the profession(职业).
Two weeks later I got a (n) __38__letter from Jack, answering my questions about materials and process(过程). He also __39__ me not to get discouraged if I was refused__40__. He said the cartoon samples（样本） I sent him were good and worthy of publication（出版）.
I got very __41__, finally understanding how the whole process__42__. I sent my best cartoons to Playboy and New Yorker, ___43___ the magazines rejected（拒绝）me immediately. Discouraged, I put my art supplies in the box and__44__to forget all about cartooning.
To my__45__, in June 1987 I got another letter from Jack, although I hadn’t even__46__ him for the former advice. Here’s what he said:
Dear Scott,
I was reviewing my “Funny Business” mail file when I again came__47__ your letter and your cartoons. I remember answering you letter.
I’m writing to encourage you to submit(提交) your ideas to various publications again. I hope you have __48__ done so and are making progress and having some__49__ too. Sometimes encouragement in the funny business is hard to come by. That’s__50__ I am encouraging you to hang in there and keep drawing.
I wish you good luck.
Sincerely,
Jack
I was deeply__51__because Jack had nothing to gain—including my thanks. I acted on his__52__, took out my art supplies and inked the sample strips(漫画连载) that__53__ became Dilbert.
I feel__54__that I wouldn’t have tried cartooning again if Jack hadn’t sent the second letter. As Dilbert became more successful I came to __55__ Jack’s simple act of kindness.