题目内容：

  The American secret service began in 1865. It has many important jobs. One is to stop different types of fraud(诈骗)， such as printing fake(假的) money, credit card(信用卡) fraud and computer fraud. The other is to protect the president at all times.

The secret service’s earliest job was to stop people from making fake money. The secret service agents(特工) still have to do that because the criminals(罪犯) are smarter now. They are better at using computers and other expensive equipment. But agents are much smarter.

Protecting the president is hard. The most dangerous places are outdoors. Agents can’t check every person in the crowd, so they must watch the crowd carefully. And they always follow the president. They’re just like the president’s shadow.

Unluckily, some criminals do want to give the president trouble, or even hurt him. The secret service agents try to find them and stop them when they want to do something bad. It’s a dangerous, but important job. The secret service helps keep the president and the country safe.

根据短文内容，选择正确答案。

1.The American secret service     .

A. isn’t to protect the president

B. makes fake credit cards

C. began in 1865

D. has only one important job

2.At the very beginning, the secret service’s job was to     .

A. protect the president

B. stop computer fraud

C. watch the crowd carefully

D. stop fake money making

3.When protecting the president,     .

A. agents must be careful at all times

B. agents don’t always stay near him

C. agents check every person in the crowd

D. agents are afraid of indoor places most

4.When underlined word “them” means the     .

A. presidents              B. criminals

C. secret service agents    D. people in the crowd

5.The most dangerous place to protect the president would be in     .

A. the White House    B. a hotel room

C. a public park      D. a main hall