题目内容：

Listen to the passage and fill in the blanks（根据你听到的内容，完成下列句子，每空格限填一词）：

1.Alice was badly ill when she was just________ ________ old.

2.Alice needs to________ ________the oxygen tank all the time.

3.A four—legged friend，a little dog，entered the________ ________.

4.The dog________ the girl ________and carries the heavy oxygen tank on his back.

5.The dog keeps up with the girl wherever she goes and they become the________ ________.