B. huge walls of flames can burn acres of land

C. they make the greatest loss of all disasters

D. they spread too fast and do great damage

【答案】　D　细节理解题。由Moving at lightning speed，huge walls of flames can burn acres of land in just a few minutes. And although technology，including the use of fire－retardant chemicals，has greatly helped the fight against forest fires，they still do great damage. 可知森林火灾被认为是最令人害怕的，是因为它们蔓延得太快，造成的损失太巨大，选D。

2. Almost 25% forest fires are set ____.

A. unexpectedly B. by lighting　

C. on purpose D. naturally

【答案】　C　细节理解题。由Almost one quarter are purposely set，while lighting causes 10%. 可知几乎25%的森林火灾是被故意点燃的，选C。

3. What does the last paragraph mainly talk about?

A. The advantages of forest fires.

B. The usage of charcoals.

C. Pine trees need fires.

D. Fires destroy all plants but two.

【答案】　A　段落大意题。由最后一个段落的主题句Forest fires can have advantageous effects. 可知最后一个自然段主要讲了森林火灾的一些好处，选A。

Ⅱ. 阅读七选五

(2019·平顶山模拟)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Ways to create calm in your daily life

Most of us need some space for calm in our lives. A few simple minutes can create much needed moments of calm. __1__ You can use these small skills to create calm in your busy schedule.