题目内容：

    1.Part of northern California had become an inferno(火海) in the latest big fire. A nearby town, Paradise, was reduced to ash. Nearly 50 people are confirmed dead and over 200 missing. Six of the ten most destructive fires in California's history have occurred in the past decade. Last year was the most destructive year on record, until this year. Why is the Golden State so flammable?

2.There are three reasons why California has been surrounded by flames. First, the climate is becoming warmer. This has led to snow melting earlier, drier landscapes and a longer season when fires are likely to occur.

3.A second reason is that more people live in flammable places. Since the 1990s 60% of new homes in California, Washington and Oregon have been built in spaces next to nature. These areas, which environmentalists call the "wildland-urban interface", are at higher risk of wildfire.

4.A third reason is that there is more fuel. Before western settlers arrived, fires used to happen often and naturally, which made less fuel available for future fires. For the past century fires have been controlled well. This has led to a build-up of dry brush, and makes the average wildfire much likelier to turn into a big one.

5.Putting out the flame is the most immediate task for California, but not the last. Many survivors will want to rebuild their homes exactly where they were. Californians will also want to ensure that utility companies(公用事业公司) are acting and investing responsibly. Investigations into what caused the fire are still going on, but some reports suggest it may have begun with sparks (火花) from lines owned by an electricity company.

1.What may directly cause the big fire in California?

A.The warm climate. B.Living too close to nature.

C.Too much fuel. D.Sparks from electric wire

2.What does the underlined sentences in Paragraph 1 suggest?

A.The fires in California are all very destructive.

B.The latest big fire in California is very destructive.

C.California suffered from destructive fires most last year.

D.There have been six destructive fires in California in the past 10 years.

3.What does the text mainly talk about?

A.The reasons why California suffered a destructive fire recently.

B.The reasons why California suffered destructive fires frequently.

C.The facts that California is a place easily suffered destructive fires.

D.The opinions that California is a place easily suffered destructive fires.

4.What is the structure of the text?

A.1//2-3// 4-5 B.1-2// 3-5

C.1//2-4// 5 D.1// 2-5