Jeff Keith has only one leg. When he was only twelve years old, Jeff had cancer. Doctors had to　16　 off most of his right leg.
　17　 Jeff puts on an artificial leg(假肢). The leg is plastic. With the plastic leg, Jeff can ski, ride a bicycle, swim, and play soccer. He can also run.
Jeff made a plan with his friends who had plastic legs, 　18　. They decided to 　19　 across America. They all wore special T-shirts.　20　 it was “Run, Jeff, Run, Jeff Keith’s Run Across America”.
Jeff Keith ran across the United States from the east to the west 　21　 he was twenty-two years old. He started running in Boston(波士顿). Seven　22　 later, he stopped　23　 in Los Angeles（洛杉矶）. He ran 3,200 miles (1 mile =" 1.6093km)." Jeff wore out thirty-six pairs　24　 running shoes and five plastic legs. Jeff　25　 in cities on the way to Los Angeles. In every city people gave Jeff money. The money was not for Jeff,　26　 for the American Cancer Society. The Society used the money to help people know 　27　 about cancer.
On the way to Los Angeles, Jeff talked to people about　28　. Jeff is disabled, but he can do many things. He finished college and is studying to be a lawyer(律师). Jeff says, “People can do　29　 they want to do. I want people to know that. I ran　30 for disabled people. I ran for everybody.”

One day, Allan and his friend Henry went swimming in a river. It was very hot. How happy they were in the river! After they got out of the water, they played games in the sun for a while.

　On their way back, Henry saw some flowers. He liked flowers very much and ran into the green field to look at them. Now Allan was walking by himself.

　Then he heard Henry calling out, "A snake（蛇）! Help!..."

　"What's wrong with you?" asked Allan.

　"A snake bit（咬）me in the leg. Come here!"

　Allan ran over and saw a small red wound（伤口）on Henry' s leg.

　"The snake was in the grass. I didn't see it."

　"Sit down quickly"! Allan told Henry.

　Allan put his mouth at the little red wound and began to suck（吸）at it. In this way he saved （挽救）Henry's life. "Oh, Allan, it's very kind of you to help me."

　　"That's all right. We are friends and we must always help each other."

1.It was________ when-Allan and Henry went out.

2.After swimming, they played in the sun________.

3.On their way home,________ got something wrong with his____

4.Henry and Allan are________.

5.Which of the following（下面的）is true?