Take the escalator—but climb the stairs while you ride. You'll get there faster and use your muscles while you're at it. Just 5 minutes of stair climbing burns 144 calories.

Instead of piling items on the stairs so you can take them upstairs at once, take them one at a time.

When cooling your heels while waiting in a doctor's office, drugstore, or airport, stay on your feet—standing burns 36 more calories per hour than sitting.

Rake leaves instead of using a leaf blower. You'll burn 50 more calories every half hour.

Scrub your floors more often. Putting some elbow grease into cleaning floors is more intense than vacuuming—and it makes your floors look better to boot.

Chew sugarless gum. Research has found that the action of jaw muscles alone burns about 11 calories an hour.

Wash your car by hand instead of taking it throug the automatic carwash. You'll burn an extra 280 calories in an hour.

Play with kids: Impromptu (即興的) games of basketball, touch football, or tag—or just jumping rope or throwing a ball—will help you use energy and set a good example of active play for the children. Calories burned: 80 to 137 every 10 minutes.

1．How can you get to some place faster?

A．Taking an escalator.

B．Taking a lift.

C．Taking an elevator.

D．Taking an escalator and climbing the stairs at the same time.

2. Which of the following statements is TRUE according to the article?

A．Compared with washing cars by hand, playing

impromptu games with kids is better for losing weight.

B．You'd better stand while waiting in the doctor's office since it's usually dirty there.

C．Cleaning the floor by hand is better than vacuuming it because it's better for your elbow's muscles.

D．Lots of people like chewing gum because they want to burn more calories.

3. The best title of the article will be ________.

A．How to Lose Weight

B．Ways to Burn Calories Without Noticing

C．Sports Is Good for Your Health

D．The More Exercise, the Better Shape You Will Have

The United States is well?known for its network of major highways designed to help a driver get from one place to another in the shortest possible time.?　36　? these wide modern roads are generally ?　37　? and well maintained, with ?　38　? sharp curves and many straight ?　39　?,a direct route is not always the most ?　40　? one. Large highways often pass ?　41　? scenic areas and interesting small towns. Furthermore, these highways generally ?　42　? large urban centers which means that they become crowded with ?　43　? traffic during rush hours,?　44　? the “fast, direct” way becomes a very slow route. However, there is ?　45　? always another route to take ?　46　? you are not in a hurry. Not far from the ?　47　? new “superhighways”,there are often older,?　48　? heavily traveled roads which go through the countryside.?　49　? of these are good two lane roads; others are uneven roads ?　50　? through the country. These secondary routes may go up steep slopes, along hilly ?　51　? or down frightening hillsides to towns ?　52　? in deep valleys. Though these are less direct routes, longer and slower, they generally go to places ?　53　? the air is clear and the scenery is beautiful, and the driver may have a ?　54　? to get a fresh, clean ?　55　? of the world.

36. A. Although     B. Since  C. Because      D. Therefore

37. A. rough   B. splendid     C. smooth       D. complicated

38. A. little     B. few     C. much  D. many

39. A. selections     B. separations C. divisions    D. sections

40. A. terrible B. Possible     C. enjoyable   D. reasonable

41. A. to B. Into    C. over    D. by

42. A. lead     B. connect      C. collect D. provide

43. A. large    B. fast     C. light   D. heavy

44. A. when    B. for      C. but     D. that

45. A. yet       B. still     C. almost D. quite

46. A. unless   B. if C. as       D. since

47. A. relatively     B. regularly    C. reasonably  D. respectively

48. A. and      B. Less    C. more   D. or

49. A. All       B. Several      C. Lots    D. Some

50. A. driving B. crossing     C. curving      D. traveling

51. A. rocks    B. cliffs   C. roads  D. paths

52. A. lying    B. laying C. laid     D. lied

53. A. there    B. when  C. which D. where

54. A. space    B. period C. chance       D. spot

55. A. view    B. variety       C. visit    D. Virtue

The dream of flying like Buzz Lightyear never dies. For years, space-age inventors have tested one wearable jet pack after another. And time after time, the designs have been grounded by dangerous fuels, excessive weight, or very loud noise levels. Now a Canadian inventor has sidestepped those weaknesses with an aquatic jet pack. Designed for travel over lakes or oceans, it’s driven by pressurized water, not burning rocket fuel.

When Raymond Li first told the idea for the aquatic jet pack to his friends, they said he must be nuts. How could a jet pack carry that much water? Its thrust-to-weight rate would be so low and it would never become airborne. Thrust-to-weight rate is a measure of the forward force produced compared with the weight of the vehicle. A vehicle with a low thrust-to-weight rate is relatively heavy for the amount of force it generates.

Li's genius idea was to place the jet pack’s engine and its water pump in a separate boat. The pump would draw water from the lake the boat was floating on. It would then force the water under pressure through a hose connected to the jet pack. The hose would be long enough to let the pack go up as high as 8.5 meters (28 feet) in the air.

Today, Li's invention, the Jetlev-Flyer, is ready to go into production. The pack itself, complete with jet nozzles （管嘴） and handlebars, weighs just 14 kilograms. The boat is a floating pod. To take off, the operator hits a trigger on a handlebar, which starts the pump, and then turns the throttle. Two streams of high-velocity water shoot through the hose and out the nozzles, lifting the operator into the air. The operator hovers there or pushes down on the handlebars, zooming forward at speeds of up to 64 kilometers per hour, pulling the pod behind.

All the following factors contribute to the failure of inventing a wearable jet pack EXCEPT ______.

A. excessive water     B. unbearable noise    C. unsafe fuels   D. too much weight 

The underlined word “sidestepped” in Para. 1 most probably means ________.

  A. improved          B. reduced         C. avoided         D. solved

Raymond Li’s friends found his idea for the aquatic jet pack was ________.

  A. exciting           B. crazy          C. realistic         D. creative

Which of the following is TRUE according to the passage?

  A. His friends encouraged him to do the invention.

  B. He put the engine and its water pump in the same boat.

  C. The success of his invention lies in his bravery.   

  D. His invention finally succeeded and will go into production.

Which is the right order to make the Jetlev-Flyer take off?

  a. The throttle is turned.                  b. The operator is lifted into the air.

  c. A trigger is hit.                       d. Two streams of water shoot out.

The pump is started.

A. c, e, a, d, b          B. c, e, a, b, d            C. e, c, d, b, a          D. e, a, c, d, b

The final _____ of the play will take place on Monday.

   A. action    B. performance    C. view    D. sight