已知：Ⅰ．煤气发生炉中主要反应有：

①  C + O₂ $\underset{\_}{\underset{\_}{点燃}}$  CO₂；       ② C + H₂O $\underset{\_}{\underset{\_}{高温}}$  CO + H₂

Ⅱ．将合成的氨气部分通入碳化塔，既除去了二氧化碳又得到了化肥NH₄HCO₃下列说法正确的是（   ）

综合填空  阅读短文，用方框中所给词的正确形式填空，使短文通顺、连贯。方框中有两个为多余。

 Once upon a time, there lived a family of mice in the kitchen. One Saturday morning Father Mouse and his son felt hungry and ____  for food. ____ they were looking for food, they saw a big cat. Baby Mouse was very ____ and climbed onto his ____  back. Father Mouse shouted at the cat. “Woof, woof!” The cat ran away____  “Wow, dad, you’re great!”said Baby Mouse. “Well, son, that's why it's important to ____  a second language.”answered Father Mouse.