Part IV 完形填空

Cloze (10 points) choices marked, A, B, C, and D. Choose the best answer for each blank and mark your answer on the Answer Sheet. The history of transportation is very long and full of changes and inventions. It starts 46 walking, which is not any invention; it just takes energy. People used to walk to get to other places. If you wanted to get somewhere quickly, the 47 way to do that was to run. Actually, the first invention for transportation 48 was the shoe. Centuries ago there were no shoes, and people walked barefoot. Then people invented 49 to transport themselves and materials from one place to another. In some cultures, people invented sledges (雪橇), 50 areakind of board that you drag along the ground. You can tie things on the sledge to help carry them, but it's a challenging invention 51 if you hitarock with the sledge as you pull it, the contents can 52 . In other cultures, people invented the wheel, which they used to make it easier to move things — and people. That was the beginning of many innovations in transportation. 53 people had wheels they could invent other ways to travel. They could put the wheel onaboard and make itawagon, and then they could 54 that wagon to an ox or a horse and ride as well as carry materials. That wheel led to 55 we have today: trucks, automobiles, and even boats and planes. For example, there were steamboats that used giant wheels that turned with blades, pushing the water and pushing the boat forward.

46. A onB atC forD with
47. A possibleB onlyC oneD just
48. A probablyB luckilyC reallyD formerly
49. A methodsB channelsC waysD measures
50. A whatB whenC whereD which
51. A unlessB butC evenD since
52. A pull outB slip offC hold downD put down
53. A OnceB ThenC HoweverD Yet
54. A stickB makeC fastenD change
55. A whatB thatC whichD how