题目内容：

When a person is hurt or suddenly（突然）becomes ill, people give him immediate（立即的）care. We call it first aid. 1. Immediate action is necessary when someone loses lots of blood or when breathing stopped for a short time.

Everyone should know something about how to care for a person with a sudden illness. Even a small injury（损伤）can be very dangerous. 2.

When first aiders face a sudden situation, they must be able to keep calm（镇静的）and organize other people to help. He or she must know how to control blood and take care of injuries. 3.

In our country, hundreds of people die in traffic accidents every year because most people don't have first aid information. 4. We may face a sudden situation anywhere. One day somebody from our family may get hurt or suddenly become ill. 5.

阅读短文，根据短文内容，从短文后的五个选项中选出能填入空白处的最佳选项。每个选项只能用一次。

A．If more people know about first aid, more lives could be saved.

B．If we don't want to be helpless in such a situation, we have to know first aid.

C．When there is a sudden situation, time is very important, so first aid plays a very important role.

D．Knowing how to move the injured without causing（引起）more injuries is also very important.

E．And it may result in death, so everyone should know something about first aid.