题目内容：

    While most people have the idea that volcano eruptions are one of the most destructive disasters in nature , seeing a volcano erupt is a wonderful experience, and you can really feel the heat by climbing to the summit of Pacaya for a close-up view.

There are guided tours every day up this highly active volcano from Antigua, giving travelers a chance to see Mother Nature at her most powerful.Pacaya is an easy drive from Antigua, a beautiful city with many colorful houses along its old streets that are turned into art-works during its Holy Week festival. No matter when you come to Antigua, you won’t miss the Pacaya-tour companies.

But climbing Pacaya is no easy job: it is 2,560 meters high, and reaching the summit takes two to three hours of seemingly one-step-forward and two-step-back movements. As you climb you hear the dull sounds of eruptions high above. Steaming, hot remains from recent eruptions begin to line the path as you near the active summit: the Mckenney Cone (火山锥). Just as though you were going to walk over to the edge of the cone, the road turns to the left and up to the relative safety of the old, inactive summit.

Many tours are timed so that you arrive at the cone of the volcano in plenty of time for sunset and the full contrast between the erupting red lava(岩浆) and the darkening sky. On a good day the view from the summit is extremely exciting. The active mouth boils,  sending red lava  over its sides, and once in a while shoots hot steams up to 100 meters into the air. There is a strong bad smell in the air even if you take care to be upwind of the cone. As evening turns deeper into the night, the burning lava quietly falls down the side of the volcano. For you, too, it is time to get down.

1.Antigua is a city     .

A. that gives a close-up view of Pacaya

B. that is famous for its tour agencies

C. where the exciting Pacaya tour starts

D. where people can enjoy cultural festivals

2.The word “summit” appears several times in the passage. It means___.

A. cooled rocks along the path

B. loud sound and terrible smell

C. the most exciting happening in a place

D. the top point of a mountain or hill

3.Many tours are timed for people to     .

A. get down the mountain in time when night falls

B. avoid the smell from the upwind direction

C. enjoy the amazing eruption against the darkening sky

D. appreciate the scenery of the Pacaya mountain

4.What is the main purpose of this passage?

A. To attract tourists .

B. To describe the volcano

C. To introduce guided tours .

D. To explain the power of nature .