World's largest active volcano全球最大的活火山

王開琴

主題語(yǔ)境：自然 篇幅：314詞 建議用時(shí)：６分鐘

1 Hawaii's Mauna Loa， the largest activevolcano in the world， erupted for the first timein nearly 40 years， US authorities said，erupting lava and ash as emergency crewswent on alert.

2 Flows of lava remained mostly containedwithin the peaks massive caldera（火山口）， but the eruption could pose a threat to nearbyresidents， the United States Geological Survey reported after the eruption inside HawaiiVolcanoes National Park.

3 Mauna Loa has been showing signs of building up to an eruption for years， accordingto the USGS， which said the ongoing eruption was visible from Kona， a town on the westcoast of Hawaiis main island.

4“Lava is still erupting from the peak and is overflowing from the caldera，”the USGSsaid on its website， referring to the basin at the top of the volcano. While it added therewere no threats to populated areas currently， it urged area residents to review preparedness?procedures“. If the eruptive vents migrate outside its walls， lava flows may move rapidlydownslope，”according to the USGS.

5 Hawaii authorities said no evacuation orders have been given， although the peak areaand several roads in the region were closed， and two shelters have been opened.RobinGeorge Andrews， a scientist， said a larger threat exists if lava begins to pour out of the so?called rift zone.

6“While there is no evidence yet of this occurring now， the fact that it is a hazardous（危險(xiǎn)的） mountain that hasnt erupted since 1984— the longest eruptive pause in itsrecorded history—is why we should all keep an eye on it，”Andrews said.

7 One of six active volcanoes on the Hawaiian islands， Mauna Loa has erupted 33times since 1843， according to the USGS. The most recent eruption， in 1984， lasted 22days and produced lava flows which reached to within about seven kilometers （four miles）of Hilo， a city to the northeast which is home to about 44，000 people today.

Reading

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1. What can we learn about the eruption according to the USGS？

A. The eruption is out of expectation.

B. The eruption is within expectation.

C. The eruption results are under control.

D. The eruption time is accurately announced.

2. What suggestions are given to the residents in populated areas？

A. Leaving their houses as soon as possible.

B. Putting up more shelters in a short time.

C. Listening to evacuation orders often.

D. Making some preparations.

3. According to Robin George Andrews， whats the potential danger？

A. The lava may begin to pour out of the so?called rift zone.

B. Scientists ignore Mauna Loas longest eruptive pause in history.

C. All of the six active volcanoes would erupt in future.

D. There are more people living near the volcano.

4. What's the purpose of the text？

A. To give advice on protecting the environment.

B. To stress the importance of natures power.

C. To tell a piece of news to the readers.

D. To introduce the history of volcanoes.

Language

Study

Ⅰ. Difficult sentence in the text

Hawaii's Mauna Loa， the largest active volcano in the world， erupted for the first timein nearly 40 years， US authorities said， erupting lava and ash as emergency crews went onalert. 美國(guó)當(dāng)局表示，世界上最大的活火山夏威夷冒納羅亞火山，近40 年來(lái)首次噴發(fā)，隨著緊急救援人員進(jìn)入戒備狀態(tài)，熔巖和火山灰噴出。

【點(diǎn)石成金】本句是一個(gè)主從復(fù)合句，erupting lava and ash是現(xiàn)在分詞作伴隨狀語(yǔ)，as引導(dǎo)時(shí)間狀語(yǔ)從句。

Ⅱ. Text?centered chunks

pose a threat to 對(duì)……構(gòu)成威脅

according to 根據(jù)

refer to 查閱；提到

pour out of 從……涌出來(lái)

so?called （表示不認(rèn)同）所謂的

keep an eye on 注意；留意

be home to 是……的故鄉(xiāng)