A
Krakatau Volcano (喀拉喀托火山)is on a small island in Indonesia.It had been peaceful for about 200 years before it erupted (爆发)in 1883.
The first signs of the activity of the volcano appeared in May 1883,when fire and smoke could be seen at the top of the mountain.Great noise could be heard even in Jakarta,a hundred miles away.Later the activity grew much greater.The peak (山顶)was covered with smoke and fire;the smoke at one time was seventeen miles high in the air.The lava—soft and hot rock—shot up into the air and rolled down the sides of the mountain.
The mouth of the volcano was not at the peak of the mountain but on its side,close to the sea.As it grew bigger and bigger with the eruption,the sea water got into it.When the sea water reached the lava inside the volcano,it made the upper part of the lava colder and harder.And this sealed off(封住)the rest of the lava below.As the inside of the lava could not break through the seal,the pressure (压力)built up until the mountain blew up.
The eruption of the volcano was followed by several earthquakes which brought about bad results.About 36,000 people were killed and many towns and villages near the sea were completely destroyed by the great waves which the earthquakes caused.
21.Give the correct order of the course of volcano eruption.
①The peak was covered with smoke and fire.
②Fire and smoke could be seen at the top of the mountain.
③Great noise could be heard a hundred miles away.
④The lava shot up into the air and rolled down the sides of the mountain.
A.①②③④ B.①③②④
C.②③①④ D.④①③②
答案:C
解析:细节理解题。从文章第二段的描述可知顺序为②③①④。
22.What made Krakatau Volcano erupt?
A.The sea water which went into the volcano.
B.The lava.
C.The pressure which was bigger and bigger.
D.All of the above together.
答案:D
解析:细节理解题。由文章第三段可知该火山爆发是A、B、C三项共同作用的结果,并非由其中的一项原因造成的。
23.Where is the mouth of the volcano?
A.At the peak of the mountain.
B.On the side of the mountain near the sea.
C.At the foot of the mountain.
D.Inside the mountain.
答案:B
解析:细节理解题。根据文章第三段第一句话“Themouthofthevolcanowasnotatthepeakofthemountainbutonitsside,closetothesea.”可判断答案为B项。
