题目内容：

Once two screws（螺丝）were friends, and they worked in an engine. One screw was proud of its _____ head. The second was only doing its job to the best of its ability_____.

One day the second screw was a little rusted（生锈）. Filled with _____, the first screw said to the second,“How _____ you have become?” Then it began to laugh so hard that it failed to notice that it was loose. Then it dropped off the _____ and fell into the dirty oil below.

Now, the second was faced with doing the _____ of two. Meanwhile, the first screw cried, “Just look at me! I’m dirty and all my beauty is gone.”

A short time later, the owner of the engine _____ it up. He immediately noticed something didn’t sound right. When he _____, he immediately saw one screw was missing, “Ah ha!” the owner said, “it must have worked itself loose and fell into the oil.”

He reached into the oil and found _____ missing screw. “Look at you!” the owner said, “You’re all ______ with oil, how ugly you are! ______ I’ll fix that right away.” He reached for a cloth and wiped all the oil and dirt off until it shone even brighter than before. Then he put it on the part. Before he turned away, he noticed the second screw was a little rusted. With the ______, he wiped the head clean and bright. Then he walked away.

______, the engine was started. The two screws, now ______ beautiful, held the part tight. “Excuse me, my friend,” the first screw said. “I was so busy laughing ______ you that I didn’t notice that I was working myself loose. I shall no longer judge others by their looks.”

1.A. big    B. sharp    C. red    D. shining

2.A. shyly    B. quietly    C. happily    D. bravely

3.A. pride    B. pleasure    C. power    D. hope

4.A. small    B. weak    C. ugly    D. selfish

5.A. ground    B. engine    C. seat    D. wall

6.A. work    B. lesson    C. problem    D. travel

7.A. finished    B. put    C. started    D. broke

8.A. drove    B. returned    C. repaired    D. checked

9.A. a    B. an    C. the    D. （不填）

10.A. covered    B. filled    C. connected    D. compared

11.A. And    B. Or    C. But    D. So

12.A. key    B. oil    C. cloth    D. tool

13.A. Finally    B. Firstly    C. Exactly    D. Usually

14.A. none    B. neither    C. all    D. both

15.A. for    B. to    C. at    D. to