①取代反应   ②加成反应  ③氧化反应  ④还原反应  ⑤消去反应  ⑥酯化反应  ⑦中和反应   ⑧缩聚反应

完形填空
    One Saturday morning, John and his mother went 1 a shoe shop 2John a pair of new shoes. Mrs. Lee put her bag on a chair3she looked at some shoes. She could not see 4she liked and went away. Suddenly(突然) she said, “Oh, my bag, someone 5it away!” All the other people in the shop stopped 6 and looked at her. John ran after the man at once(立刻). A few minutes 7 , John came back with 8. He 9 it to his mother. She opened the bag and had a look in10.Then she said,“ Oh, god, nothing is lost.”

用____可以测出风力的大小，也就是风速，用____表示。