Cloze

Directions: In this part, there is a passage with ten blanks. For each blank there are four choices marked A, B, C, and D. Choose the best answer for each blank.
     The history of transportation is very long and full of changes and inventions. It starts  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  way to do that was to run. Actually, the first invention for the transportation  was the shoe. Centuries ago there were no shoes, and people walked barefoot.
     Then people invented  to transport themselves and materials from one place to another. In some cultures, people invented sledges (雪橇),  are a kind of board that you drag along the ground. You can tie things on the sledges to help carry them, but it’s a challenging invention  if you hit a rock with the sledges as you pull it, the contents can . In other cultures, people invented the wheels, which they used to make it easier to move things — and people. That was the beginning of many innovations in transportation. 

      people had wheels they could invent other ways to travel. They could put the wheels on a board and make it a wagon, and then they could  that wagon to an ox or a horse and ride as well as carry materials. That wheel led to  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.