题目内容：

在下列各句的每个空格内填上一个适当的、完整的单词，该词的首字母已给。

1.Tom felt too sleepy to keep a______ in history class.

2.I can’t follow you. Can you e_____________ it to me again?.

3.Mary is s____________ to be a good learner. Everyone thinks so.

4.Last month 10 persons were killed in the traffic a_________.

5.He never does anything at home. He isn’t a h_______ boy. He’s a lazy boy.