3．World's Largest Active Volcano Erupts in Hawaii Hawaii's Mauna Loa，the largest active volcano in the world，has erupted for the first time in nearly 40 years，US authorities said，erupting lava and ash Monday，Nov.28th，2022 as emergency crews went on alert.
Flows of lava remained mostly contained within the peak's huge caldera，but the eruption could pose a threat to nearby residents if conditions change，the United States Geological Survey reported at 11：45 pm local time Sunday about 15 minutes after the eruption inside Hawaii Volcanoes National Park.
Mauna Loa has been showing signs of erupting for years，according to the USGS，which said the ongoing eruption was visible from Kona，a town on the west coast of Hawaii's main island about 72 kilometers from the volcano.
"Lava is still erupting from the peak and is overflowing from the caldera，" the USGS said on its website，referring to the basin at the top of a volcano.While it added there were "no threats to populated areas currently，" it urged area residents to review preparation procedures.
Hawaii authorities said no evacuation（撤離，疏散） orders have been given，although the peak area and several roads in the region were closed，and two shelters have been opened.
Robin George Andrews，a scientist，said a larger threat exists if lava begins to pour out of so-called rift zones（裂谷帶）.
While there is no evidence yet of this occurring now on Mauna Loa， "the fact that it is a dangerous mountain that hasn't erupted since 1984— the longest eruptive pause in its recorded history— is why we should all keep an eye on it，" Andrews said.
One of six active volcanoes on the Hawaiian islands，Mauna Loa has erupted 33 times since 1843，according to USGS.
The most recent eruption，in 1984，lasted 22 days and produced lava flows which reached to within about 7 kilometers of Hilo，a city to the northeast which is home to about 44，000 people today.
（1）Which of the following statements would USGS agree with？
A．The eruption time is correctly predicted.
B．The eruption is within expectation.
C．The eruption results have been under control.
D．The eruption will pose a threat to people living nearby.
（2）What suggestion is given to residents in paragraph 4？
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，what's the potential danger？
A．No one knows how to judge the eruptive pause.
B．There are more people living near the rift zones.
C．There is a possibility that the lava pours out of rift zones.
D．All the six active volcanoes on the Hawaiian islands will erupt.
（4）Why does the author write this passage？
A．To give advice about protecting the environment.
B．To stress the importance of natural's power.
C．To tell a piece of news to the readers.
D．To introduce the history of volcanos.
