根据短文理解，选择正确答案。
Black Spider（蜘蛛）was having trouble catching bugs（臭虫）in his web, while Grey Spider caught two bugs in his.
“You are so lucky,” Black Spider said to Grey Spider. “You have two bugs while I have none. It's not fair(公平的).”
“Everyone has lucky days and unlucky days. Let's eat the bugs together,” said Grey Spider.
Black Spider decided to join Grey Spider for lunch.
“You must do some special things to get lucky, is it magic?” Grey Spider whispered.
“No, build your web!” said Black Spider. “Repair your web! Enlarge your web! Make your web wider!”
“Is that all?”
“Yes, build a new web!” said Grey Spider.
After lunch, Black Spider went back and made a new web. He built his web wider. Once he was done he slept all through the night because he was very tired.
In the morning, Black Spider was excited to see four bugs in his web. He told Grey Spider about it. Grey Spider smiled at Black Spider. “By enlarging your web, you have enlarged your possibility to catch all these bugs,” Grey Spider said. “There is chance all around us. Luck is everywhere. You need to work to make it so more good luck comes your way.”
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