题目内容：

One morning when I was 11, I explored the town’s abandoned round grain barn（谷仓）.I found a chained sliding door that was wide enough for me to pass through.

Inside, there was a heavy smell of dead mice in the dark.After my eyes adjusted, I noticed a shaft (升降机井) that rose all the way to the top of the barn.On one side was a one-man elevator with a long rope and roller.

I stepped onto the platform and gave the rope a drag and the elevator began sliding up the shaft, but stopped halfway.After a brief panic attack, I noticed holes in the wall at regular intervals, forming a ladder.For reasons known only to an 11-year-old, I decided it would be better to go up than down.So, with shaking hands, I began climbing the wall.

After what seemed like forever, I reached the top of the shaft.I stood up, dusted myself off and found absolutely nothing of interest.It was just an empty room with a ladder leading up to the roof.I climbed all the way up here for this? Then I noticed a fire extinguisher（灭火器）, which I’d always wanted to shoot off.So this was the chance of a lifetime.I tried it, and much to my surprise, the thing worked! It shot out a thick cloud of powder that instantly filled the room.I couldn’t breathe.I was going to choke to death, and they’d probably never even find my body.

Luckily, I remembered the ladder to the roof.I climbed up, popped the straw roof and saw a bright blue sky.

I suddenly realized the dust and powder pouring out of the top could draw attention.So when the dust had settled, I climbed down and slipped out of the chained door.I’m not sure if I was more excited about being alive or about not being caught, but I ran all the way back home.

1.When the author got inside the barn, he _______.

A.noticed a man on the elevator

B.opened the chained sliding door

C.saw many dead mice in the dark

D.found a shaft leading to the top

2.After getting out of the chained door, the author might feel _______.

A.inspired

B.relieved

C.surprised

D.disappointed

3.From the passage, we can learn that the author was probably a boy full of _______.

A.passions

B.dreams

C.curiosity

D.imagination