阅读下列短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
Once there was a man. He lived with monkeys. He played ____ the monkeys. He even like ____ (talk) to the monkeys.
The man loved the monkeys and treated them like his own children. That's why he was ____ (call) Papa Monkey.
Every day, Papa Monkey gave some bananas to his monkeys. He gave them in the morning and at night.
One day, Papa Monkey almost ____ (run) out of bananas. He called his monkeys together. "I'm sorry," he said, "I can only give you three bananas in the morning ____ four bananas at night.
When the monkeys heard this, they ____ (be) very unhappy. "Only three bananas in the morning?" cried the monkeys. "Give ____ (we) more bananas, please!"
Papa Monkey had ____ idea. "I will give you four bananas in the morning and three at night. How about that?" he said. The monkeys yelled (喊叫) ____ (joyful), "Four bananas in the morning! That was much better!" They kissed Papa Monkey.
____ silly the monkey are! What is three plus four? What is four plus three? The monkeys got the same seven bananas a day!
发现或学说开始，化学才开始成为一门科学