Ted worked in a factory in a big town. He liked (1) ____ very much, and was very good at it. When he was free, he went down to the small river behind the factory and tried to catch some fish, but there were very few (2) ____, because the water was very dirty. Then one summer he went to the sea during his holidays and stayed at a small cheap hotel.

"I've never fished in the sea (3) ____," he thought. "It will be different from fishing in our river."

On the first day he caught a lot of fish and was very happy. He gave them to the hotel, and they cooked them for all the guests, and they enjoyed (4) ____ very much.

After that,he did (5) ____ every day. But when Ted got his bill（帐单）at the end of the week, he saw on it:"For oil to cook the fish ( 7 days ): ￡ 3.50."

A.there
B.fishing
C.them
D.that
E.before
_______