题目

Earth is a rocky planet_____ liquid water, which is necessary for life, can exist. A. as       B. which            C. where          D. when 答案：C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, gavehis 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.