题目内容：

Larry Ritsema was out for an early morning jog around his neighborhood on one weekend.On a quiet street, he began to feel weak.Suddenly, everything went black.Larry fell to the ground.

Less than a minute later, Tom Alguire passed by on his bicycle.He caught sight of a man lying on the roadside, so he jumped off his bike and ran over.He recognized Larry immediately, because he had been Larry’s doctor for nearly 20 years.

Dr Tom felt for a pulse at first.Finding none, he began to give Larry first aid.It wouldn’t restart Larry’s heart, but it would keep the blood flowing until someone else arrived.Tom could only hope someone would come by soon, around six o’clock in the morning on a holiday weekend.Tom couldn’t stop pressing Larry’s chest to run for help — Larry’s brain cells would die without the blood.And Tom didn’t have a mobile phone with him.

Soon, a car did drive by.But the driver ignored Tom’s appeal for help.What was he going to do? Tom was very worried.Finally, another car came down the road,  driven by Michael Saliot, a US Coast Guard Officer.Michael wasn’t one to pass up a chance to help a person in need.He quickly dialed 911.

Doctors then found that Larry had suffered a heart attack and there were severe blockages in two of Larry’s major arteries (动脉)．Only the timely arrival of Dr Tom saved his life.

How did Dr Tom happen to be bicycling that morning down that quiet street? It turned out that as Tom rode, his bike chain fell off.He spent about eight minutes fitting it back; otherwise, he would have seen nothing of Larry’s problem.

1.Doctor Tom gave Larry first aid in order to ________.

A. wake up Larry

B. restart Larry’s pulse

C. keep Larry’s blood flowing

D. stop Larry from bleeding

2.Which of the following is TRUE according to the passage?

A. Michael Saliot was a man always ready to help others.

B. Tom Alguire saw Larry when Larry fell to the ground.

C. Larry Ritsema went to work early on foot that morning.

D. Tom fitted his bike chain back after Larry was sent to hospital.

3.We can infer that ________.

A. Larry took Tom as his doctor twenty years ago

B. it’s not good to run in the early morning

C. Larry’s neighbors were selfish

D. only Tom can save Larry

4.What’s the best title for the text?

A. A kind­hearted doctor

B. Saved by the coincidence

C. How to save a patient?

D. A lucky runner