题目内容：

单词拼写

根据下列句子及所给单词的首字母写出所缺单词。在填写答卷时，要求写出完整单词。（每格限填写一个单词）

1.I don’t understand the m_______ of the new word.

2.The little girl o______ her seat to an old man on the bus this morning.

3.I received an invitation but I didn’t want to a______ it.

4.The boy fell off his bike and was badly h______.

5.Thousands of people s_______ from the heart disease.