Emergencies(紧急情况) don’t happen very often. But when they do, you want to get help first. No one wants to spend time looking up the phone numbers. 

In 1968, the Untied States government wanted one number that people could call for emergencies. They decided that 911 was easy to remember and people could dial it quickly. The very first 911 call was made on February 16, 1968. in Alabama. Today, 911 is used for emergencies in most parts of the United States and many parts of Canada.

Other countries may use other numbers. In Great Britain, it’s 999. If you’re not sure which emergency number is used in your area, check your phone book.

When to call 

Never call 911 as a joke or just to see what might happen. The only time you should call 911 is when a person is badly hurt or in danger right now! So call when there is a fair, a car accident, or sudden sickness, etc. 

When in an emergency call

When you dial the 911 operator(接线员), it’s always OK to give out your information. Speak slowly and clearly when you explain what’s happening. What happened? Where are you? Who needs help?

Don’t hang up(挂断)!

If you have to call 911, do not hang up until the operator tells you it’s OK to do so. That way, you can be sure that the operator has all the information to offer help fast. 

A dog named Faith dialed 911 when her owner who was in a wheelchair fell and needed help. She had been taught to use a speed-dial(快递拨号) function.

1.The emergency number 911 was first used in ____ in the USA.

A 1958

B 1968

C 1978

D 1999

解析：选B。选B。细节理解题。根据文中第二段第一句“In 1968, the United States government wanted one …”可知，在1968年美国政府确定了这个号码为紧急救援号码。故选B。

2.Why was 911 chose to be the emergency call?

A Because other countries also used the number.

B Because it was suggested by the phone company.

C Because it was simple and easy to remember and dial.

D Because it was also used in many parts of Canada.

解析：选C。选C。细节理解题。根据文中第二段第二句“They decided that 911 was easy to remember and people could dial it quickly.”他们觉得911很容易记忆和迅速拨打。故选C。

3.People can’t call 911 when ____.

A a bus hits a boy badly

B a girl feels bored

C an old lady falls off the stairs, unable to stand up

D some people can’t get out of a burning building

解析：选B。选B。推理判断题。根据文中“Never call 911 as a joke or just to see what might happen. The only time you should call 911 when in an emergency call.”不要打911开玩笑或者去看可能会发生什么。只能在紧急情况下才可以拨打。故可推断出，一个女孩儿感到无聊的时候不能拨打该号码。

4.Which is the right thing to do?

A Wait for the operator’s words to end the call.

B Tell the operator what has happened and hang up.

C Test if your phone can get through to 911.

D Tell the operator everything as quickly as possible.

解析：选A。选A。细节理解题。根据文中“If you have to call 911, do not hang up until the operator tells you it’s OK to do so. That way, you can be sure that the operator has all the information to offer help fast.”可知，在接线员没有说完急救信息以前不要急于挂电话。这样接线员才能尽快地提供帮助。故选A。

5.Which is NOT true according to the passage?

A 911 is an emergency number almost throughout the United States.

B We haven’t got a worldwide universal(通用的) emergency number yet.

C Usually phone books list emergency call numbers.

D The dog Faith pressed the three numbers 9-1-1.

解析：选D。选D。细节理解题。根据文中最后一句“She had been taught to use a speed-dial function.”，说明这条狗拨的是快捷通话键，而不是三个号码9-1-1。故选D。