The Alaska earthquake of March 27, 1964 was one of the biggest     1     (disaster) in the earth science. As it was a holiday, many people were at home. Everything was going on as usual     2     people’s houses     3     (shake). Buildings     4     (crack) and water pipes burst. It lasted more than four minutes and many people were buried under the     5     (ruin), who waited for rescue workers to come     6     their rescue. The earthquake left people    7    shock and destroyed many towns and a great number of people suffered     8     the disaster. However, they all did everything in their power     9     (rebuild) the city.

Nicholas, intrigued by adventure stories,     1     (出发去滑雪) with his father. They had a wonderful day. When they were to leave, Nicholas decided to go down unusual trails himself. Unfortunately, a fierce snowstorm swept the area and Nicholas was lost. He remembered the story he ever read, in which a man was abandoned in a wild area and had to help himself out. “I would not shrink from danger. It’s time to     2     (我学到的技巧付诸实践了),” he whispered. He determined to     3     (逃命). Although in a subdued mood, he would not retreat.     4     (再三考虑之后), he     5     (全身心地建一个雪洞) to keep himself warm. The next day, he was found by his father, safe and sound.

One day, while Tom was behind the wheel, some yellow vests     1     (分散了他的注意力). It is some volunteers dedicated to environmental protection work who are cleaning up the garbage on the roadside.     2     (相比) those who spit in public and litter about, these volunteers       3     (激励他做一些促进环境保护的事情). On reflection he decided to join the volunteers since the beautiful environment       4     (依靠每个人的贡献).

Wolong National Nature Reserve is located in Sichuan Province. Owing     1     a warm and humid (潮湿的) climate favorable to bamboos, pandas' favorite food, it is an ideal habitat for giant pandas.     2     is apparent that more than one hundred pandas once     3     (inhabit) there, accounting for over 10% of the nation's total.

The reserve is also widely known as a “Bio­gene Bank” because     4     substantial number of species, including rare and     5     (endanger) species, are found there. Wolong National Nature Reserve has been a UNESCO World Heritage Site since 2006.The inclusion has ensured a secure environment for all the species in the area.

    1     moment I stepped out of school, I saw a dark blue­gray cloud approaching. But I didn’t know what a huge tornado was. I heard my mother yell my name. She asked me to get in her car. I ran to the car and got in. She     2     (immediate) started the car and headed for our house.

When I looked back at the cloud, it had a small funnel­looking (漏斗状的) cloud inside. We finally got to our house and then we heard a loud siren (警笛). My dad looked scared in the     3     (emergent). He brought the radio and a flashlight, while my mom    4     (grab) some batteries. My mom attempted     5     (shelter) me from the disaster. We turned on the radio and heard that an EF­2 tornado had touched down just east of my school. Then I heard a long deep sound that began to shake the house. That was the most horrible moment of my life and I hoped nothing like that     6     (occur) again.

As students, what can we do to prevent natural disasters     1     happening and reduce the loss to the minimum? First of all, we should do our part to protect the environment. At the same time, measures must be taken     2     (raise) the public’s environmental awareness. We can give lectures, hand out booklets specially     3     (design) for the public or hold photo exhibitions of natural disasters. Secondly, in view of our     4     (limit) knowledge, it’s very practical and helpful to have more knowledge about natural disasters. Having some basic first­aid knowledge and survival skills, which will be     5     (benefit) to us all, is also essential. Last but not least, we hope the government should pay more attention to forecasting technology and allocate more funds for related research. I am convinced that if everyone does his best, we can live in harmony     6     nature.