用所给单词的适当形式填空, 未提供单词的根据上下文填入适当的词。

Once upon a time, a big lion lived in a zoo. One day, he ____ (be) very hungry. When Bill, the keeper, gave____his dinner, he ate it up quickly. Quite by mistake he ate up the keeper too. ____it was time for lunch, Bill did not show up. The other keepers sat down to eat, still wondering ____ young Bill was not there. ____ (sudden) there came a loud sound from the Lion House. They went ____ (see) what was the matter. There they saw the big lion ____ (lie) on the ground. He looked____ (big) than before. The keepers looked at one another and all of them said at once, “Of course! The big lion has eaten poor Bill.” They got two ____ (bottle) of medicine quickly, and then they made the big lion sleep for ____operation (手术). They cut up the front of his belly (肚子).Bill jumped out from it, looking quite all right.