根据短文内容在下面的每个句子的空格中填上一个词，使其意思与原文相符。
This is a story about a monkey. An old man had a monkey. The old man liked the monkey very much.
The monkey was very clever. When birds came to the garden, he drove them away. He also helped the old man
in many other ways.
One hot afternoon in the summer, the old man was sleeping in his chair in the garden. A fly (苍蝇) came
and sat on the old man's nose. The monkey drove it away. Soon the fly came back and sat on the old man's nose
again. Again the monkey drove it away. Again and again, the monkey became very angry. He jumped up and ran
to pick a large stone. When the fly was on the old man's nose again, the monkey hit it hard with that stone. The
fly fell off, but the old man's nose was broken.
Well, many people, sometimes do things just like monkey. They do things too hastily (草率地) but they
don't think much before they do. Maybe they sometimes bring us trouble, though they mean to do something
good.
1. The monkey could do a ________ of __________ for the old man.
2. When the old man was __________, a fly _________ and sat on his nose.
3. The monkey got very angry because he _________ drive the fly ___________.
4. At last the fly was ___________ but the old man's nose was ____________.
5. We can learn from this story that we must think ___________ ___________ we do anything.