查得资料：该牙膏摩擦剂由碳酸钙、氢氧化铝组成；牙膏中其它成分遇到盐酸时无气体生成．

    Tom woke up on Monday morning, he felt 1. He always felt sick on Monday morning. He had to go to school for five 2 every week! He almost wished there were no weekends. 3 was even more difficult for him to go back to school!

    He 4 in bed and wondered what excuse he could make this time. He looked at his body, but could find 5 wrong. A little headache? 6. He had used that excuse many times. Then he realized that one of his teeth was loose(松动). Good! He was just going to start groaning（呻吟）7 he thought that Aunt Polly would pull the tooth out. That would 8! He looked for something else. Suddenly he remembered what the doctor had said about a certain problem with his toes（脚趾）. He pulled his right foot out and looked at it. 9 of the toes was really hurting. Tom began to groan.

    "What is 10 with you?" Aunt Polly asked.

    "My toe hurts."

    The old lady fell into the chair, 11 a little, "Tom, you frighten me. Now shut up at once and get out of 12."

    Tom felt like a thief being caught. "Well, it seems all right. It hurts so much 13 I forgot my teeth. One of them loses and it hurts 14."

    "No problem," answered Aunt Polly. "I can pull it out."

    "Please, Auntie! Don't pull it out. It has15 hurting. Please!"

    "No way! Well, you will have your tooth out or you will go to school."

阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

    One day, a lady bought some bath soaps from a shop. When she opened one of the packets, she found that it had no soap; it was just an empty wrapper! She made a 1 against the factory and got her money back with a successful claim. That being 2, there was a task before the management of the soap factory. How had this happened? How could they3 that the incident would not occur again?

    After a detailed 4, it was discovered that during the 5 of wrapping, it so6 that one or two wrappers did get through without any soap in them! There was no way to 7 the difference between a full wrapper and an empty one. The process of handling each one separately for this purpose seemed to be very difficult. So, the technical 8 was given the job of finding a method to 9 the problem. The man prepared a detailed report and suggested setting up a computer-based system that would weigh and scan each bar, for the empty packs could not be 10 by a normal x-ray machine.

    The management heard him out and passed the 11 to release some money to buy the new machinery that he had asked for . An 12 worker said, “Excuse me, Sir, 13 my rudeness, but I have a 14 that will cost a tiny amount of what you are planning to spend.”

    The management 15 in the beginning. But 16, they heard him out and agreed to try out his suggestion. The next day, the worker brought a strong industrial fan. He put it at an angle near the 17 belt, on which the packed soap bars were coming through, and 18it on. The few empty wrappers that came through got 19 by the fan! A simple solution for a 20 problem!

    This proves that the educated do not have a patent on good ideas.