题目内容：

    The year was 1999. I was 18, living with friends in a town about an hour north of Milwaukee. Desperate for adventure, we often talked about haunted (闹鬼的) locations, and even wandered around the woods near Rienzi Cemetery. So when a friend shared a story about an abandoned house just down the road from Rienzi, how could I possibly resist? The group of us jumped in the car and headed off into the wild unknown, completely unaware of the misfortune that would soon befall us.

The house was isolated, overgrown and barely visible from the road. Most of its windows were broken. It seemed completely neglected except the locked door and a NO ENTRY sign outside. How would anyone notice, or possibly even care, if we went in and looked around?

We stole inside, hoping for anything to prove the legend. Nothing valuable was found until an old letter, addressed to a Mr. J. Witherell, caught my eye. Its paper was stiff and yellowed. Excited by the physical evidence, I slipped the letter into my back pocket. I was about to exit the house when I noticed firetrucks and police cars lining up out on the road. While most of us were exploring the house, one of us managed to knock a fire detector off the ceiling, which triggered an automated alarm at the fire department. I quickly alerted the others, but there would be no escape.

After a moment of panic, we decided to go outside and face the music. To avoid a theft charge, I left the letter where it was before stepping outside.

The result? Not only did we all get fined for entering, we were required to pay for property damage totaling $1,500 each — too much for us to afford.

For so many years, I have been wondering: Why is the deserted house so heavily protected with detectors and other security measures? Why is the property regularly maintained? What's the story behind that mysterious letter?

1.What did the shabby appearance of the house seem to remind the kids?

A.They would have no trouble entering it.

B.Their entry would bring them a surprise.

C.Their entry would disturb the neighbours.

D.Their behavior would be noticed by its owner.

2.Why did the author attempt to take the letter away?

A.It might reveal who had been maintaining the house.

B.It might help uncover the mystery of the abandoned house.

C.It must have been written to disclose a tragedy.

D.It was an evidence of the house being heavily protected.

3.What led the police cars and firetrucks to arrive so quickly?

A.The police officers were checking there.

B.The house owner reported to the police.

C.The police cars were passing by accident.

D.Some boy started the fire alarm system.

4.What can we infer from the last paragraph?

A.The empty house has been under strict protection.

B.The author wonders why they got fined.

C.No maintenance to the house is conducted regularly.

D.There is much mystery about the abandoned house.