根据句意及首字母提示填空。

1.The boy always _____ _____(犯错) in math.

2.It t_____(花费) us three hours to get to the top of the mountain.

3.The scientists finally s_____(发射) the man-made satellites into the space.

4.You have the r_____(责任) to protect your children.

5.Only you catch o_____(机会), you will be successful.

以下不是信息系统的主要功能的是哪个（）

A.运行

B.存储

C.输入

D.控制