题目内容：

 

1.It is_____ (必要的) for you to see a doctor if you are ill.

2.I believe，_____ (知识) can change one's fate.

3.The boy often _____(不及格) the test，but the teacher didn't give him up.

4.Jack paid the _____(账单) for me when we went shopping together.

5.Jane feels nervous because the_____(考试) is coming.