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Sequoia National Park(红杉国家公园) is closed. The park is in California, US. The world’s tallest(最高的) trees grow there. They are called sequoias.
About 2,400 sequoias are in the park. Two large fires are burning close to the park. It is possible(可能的) that the sequoias will burn. Firefighters(消防员) put aluminum(铝) around the lowest(最低的) parts of the trees. It will keep them safe from fire.
General Sherman is the tallest tree in the world. It is in the park, too. It is 83.82 meters high. It is between 2,300 to 2,700 years old.
Fires are also good for sequoias. It is interesting that fire helps sequoias grow. When it is hot, sequoias make more seeds(种子). Fires burns other trees. Then, sequoias have more space.

1.Where is Sequoia National Park?

A In Canada.

B In France.

C In the UK.

D In the USA.

解析：选D。细节理解题。根据第一段The park is in California, US.可知，该公园位于美国加利福尼亚州，故选D。

2.Why do firefighters put aluminum around the sequoias?

A To keep them clean.

B To keep them safe from fire.

C To make them more beautiful.

D To make them stronger.

解析：选B。细节理解题。根据第二段Firefighters put aluminum（铝） around the lowest parts of the trees. It will keep them safe from fire.可知，消防队员沿着树的最低处覆盖上了铝箔。这将使他们免于火灾，故选B。

3.From the passage, we know sequoias_______.

A only live in California

B are not easily burnt

C need to keep warm in winter

D are the tallest trees in the world

解析：选D。D 细节理解题。根据第一段The world’s tallest trees grow there. They are called sequoias. 可知，红杉树是世界上最高的树种，故选D。

4.Which is NOT mentioned about General Sherman?

A Its age.

B Its height.

C Its history.

D Its place.

解析：选C。C 细节理解题。根据第三段可知，谢尔曼将军也在公园里。它高83.82米。它的年龄在2300到2700岁之间。文中并未提及它的历史，故选C。

5.The last paragraph tells us that _______.

A fires can help Sequoias grow

B sequoias must make more seeds

C sequoias have no living space

D sequoias cannot grow with fires

解析：选A。A 段落大意题。根据最后一段可知，火对红杉也可能有益，它能帮助红杉生长。热的时候，红杉能产生更多的种子。火也能烧掉其他树木，给红杉更多空间生长。故选A。