题目内容：

    The first time a tortoise walked through my hut at Middle Camp on Aldabra Atoll, I was amazed. I grabbed my camera and carefully positioned myself to take this wildlife encounter. The second time: same thing. The third time: I picked up my phone and took a snapshot. By the fourth or fifth time, I didn't even look when I felt something bump into me. I knew what it was.

I was there to shoot a story about island restoration（修复）in the Seychelles, far off the east coast of Africa in the Indian Ocean. Until roughly the middle of the past century, the small island nation showed signs of real environmental killing—local vegetation（植被）cleared to make way for coconut plantations, foreign rats and mice running uncontrolled, native sea turtles and giant tortoises being exploited. Biodiversity seemed destroyed. But then the country experienced a shift in conservation awareness — and the giant Aldabra tortoises are among its most visible signs.

Every morning when I woke up and walked outside the hut, I had to remind myself that I hadn't traveled back in time. I could see flightless Aldabra rails, coconut crabs the size of dinner plates, and giant tortoises—roughly four feet long and weighing up to 550 pounds—just wandering around. The number of sharks in the bay was crazy. Frigatebirds and boobies（鲣鸟）nested in the mangroves（a kind of tree）. When we left our hut doors open, which we often did to let in air, the tortoises would walk right through.

In the late afternoon or early evening, whenever they'd finished eating, the tortoises would drop themselves down and fall asleep with their heads outstretched. That made nighttime trips to the outhouse perilous. To get there, we'd have to go 200 feet into the mangroves, negotiating what I called the tortoise slalom （之形障碍）trail.

It was a track without a pattern, because of course they picked different places to sleep every night. Avoiding them was important: Falling headfirst over a tortoise onto the sharp coral rock could lead to serious injury on an island far from medical facilities.

Nothing was easy on Aldabra, and much of it was insanely difficult. Yet living among the tortoises in this primordial place, in one of the last spots where reptiles still rule; was one of the happiest times of my life.

1.How did the author feel about his final meeting with the tortoise in his room?

A.Calm B.Excited C.Concerned D.Disturbed

2.What made the wildlife on the island suffer during the last century?

A.Introducing foreign species. B.Killing too many rats and mice.

C.Planting lots of coconut trees. D.Repairing the building on the island.

3.What does the author intend to do in paragraph 3?

A.To stress the importance of their work.

B.To introduce how large the tortoises are.

C.To present his daily routine on the island.

D.To show how the wildlife is diverse on the island.

4.Which can best replace the underlined word "perilous" in the 4th paragraph?

A.risky . B.competitive C.successful D.interesting

5.What might be the suitable title for this passage?

A.Island fills with curious tourists.

B.Tortoises rule on this isolated island.

C.Efforts are made to protect the environment.

D.Aldabra is heaven for wild animals.