题目内容：

    The wildfires damaging parts of Australia can be seen from space in new satellite images released by NASA. Australia's capital, Canberra, was enveloped in a smoky haze Sunday and air quality at midday was measured at 10 times the usual dangerous limit. The damaging fires have killed at least 24 people in Australia and destroyed almost 2,000 homes. The early and damaging start to Australia’s summer wildfires, fed by drought and the country's hottest and driest year on record, has also been catastrophic (毁灭性的) for the country's wildlife, likely killing nearly 500 million birds, reptiles and mammals in New South Wales alone, Sydney University ecologist Chris Dickman told the Sydney Morning Herald.

Under such extreme conditions, the fires have been generating enough heat to create their own weather systems, including fire-generated thunderstorms and fire tornadoes. Thousands of firefighters continued to fight the flames that have burned millions of acres in New South Wales, Victoria and South Australia, an area twice the size of Maryland. In New South Wales, the rural fire service (RFS) said as of Sunday there were 150 fires active in the state, 64 of them uncontrolled.

On Saturday, Prime Minister Scott Morrison announced that, for the first time in Australian history, 3,000 army, navy and air force reservists (后备军人) will battle against the fires. He also committed $14 million to hiring fire-fighting aircraft from overseas. On Sunday, cooler temperatures and lighter winds brought some relief to threatened communities, a day after thousands were forced to escape as flames reached the suburban areas of Sydney. Thousands of firefighters fought to contain the fires, but many fires continued to burn out of control, threatening to wipe out rural townships and causing almost incalculable damage to property and wildlife.

1.What does the underlined phrase “fed by” mean ?

A.get food from someone B.be strengthened by something

C.be destroyed by something D.under control of something

2.Why were there thunderstorms and tornadoes ?

A.Because the fires generated thunderstorms and tornadoes.

B.Because there was rainy weather.

C.Because the fires generated enough heat to create extreme weather.

D.Because the weather systems is easy to change.

3.What can we learn form the last paragraph ?

A.Many soldiers will fight against the fires as they have done before.

B.Fires were controlled due to cooler temperatures and lighter winds.

C.A lot of people moved out of the suburban areas.

D.Damage to property and wildlife is limited.

4.What would be the best title for this passage ?

A.Australia's destructive wildfires B.Soldiers fought against the fires

C.Wildlife died form the fires D.Australia’s wildfires was under control