Mr. Black was working in a factory in a big town. He liked 　1　 very much, and was very good　2　 it. When he was free, he　3　 down to a small river behind the factory and tried 　4　 some fish, but there were very few there, 　5　 the water wasn’t clean. One summer he went to the seaside during his holiday and stayed at a small cheap hotel.
“I have never fished in the 　6　 before.” He thought. “It will be more interesting than fishing in our river.”
　7　 first he caught a lot of fish and was very 　8　 . He gave them to the hotel and they cooked them for guests, and he enjoyed himself very much. After　9　, he did this every day. But 　10　 he got his bill(账单) at the end of the week, he saw it, “For oil（油） to cook fish(7 days), 70 dollars（美元）.”

Mr. Black was working in a factory in a big town. He liked 　1　 very much, and was very good　2　 it. When he was free, he　3　 down to a small river behind the factory and tried 　4　 some fish, but there were very few there, 　5　 the water wasn’t clean. One summer he went to the seaside during his holiday and stayed at a small cheap hotel.

“I have never fished in the 　6　 before.” He thought. “It will be more interesting than fishing in our river.”

　7　 first he caught a lot of fish and was very 　8　 . He gave them to the hotel and they cooked them for guests, and he enjoyed himself very much. After　9　, he did this every day. But 　10　 he got his bill(账单) at the end of the week, he saw it, “For oil（油） to cook fish(7 days), 70 dollars（美元）.”