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This past summer I went on a journey to Canada’s Arctic with Students On Ice. When I left Calgary I wondered what I would find, what I would learn and who I would meet. On the trip to Ottawa I was wrapped in a blanket of uncertainty and excitement.

But when I first met the group of students, scientists and expedition leaders, I knew that I didn’t have anything to worry about. The group was amazingly receptive and I was soon part of a big family setting out on an amazing adventure— an adventure of a lifetime!

When we reached the Arctic I was overwhelmed with its immensity（广大） and beauty and my senses were repeatedly shocked and amazed.

I stood on the deck of the Kapitan Khlebnikov and saw countless towering icebergs, twelve Polar bears, a few rare Ivory gulls, and mountainous islands. I flew over gigantic glaciers and stood on the frozen Arctic Ocean where polar bears walk in search of seal holes, and patiently wait for a meal.

I learned that polar bears are successful only one out of every twenty hunting attempts. I saw a vast land that appeared untouched and original.

However, I learned that the Arctic and its inhabitants are being threatened by pollution and global warming. I learned that pollutants are carried by ocean and air and have a negative effect on all Arctic inhabitants. I learned that global warming has put Polar bears at risk because a warmer climate means that they have a shorter time to hunt seals on the ice.

The trip was a feast for the senses. I have learned more about our environment, and particularly how alive and interesting the Arctic is and why it is so important to take care of it. I learned pollution, ignorance of individual and global problems need to be solved. The Arctic deserves to be preserved. My trip with Students On Ice has made me more determined to try to ensure that I do not leave negative or harmful footprints on either Earth or its people.

1.What does the underlined part in Paragraph 1 mean?

A The author was happy and full of wonders.

B The author was very excited but he felt cold.

C The author didn’t remember where the blanket was.

D The author was too excited to bring the blanket.

解析：选A。A 猜测句意题。上一句When I left Calgary I wondered what I would find, what I would learn and who I would meet. 说明作者心里充满了疑惑、期待，并且由划线句中的excitement可推测出作者很开心。故选A。

2.What can we learn about the group that the author joined?

A It included people from different fields.

B It made the author a little worried at first.

C It was founded by a big family.

D It was amazing and challenging.

解析：选A。A 细节理解题。根据文章第二段第一句可知这个组织的人员来自各个不同的领域，故选A。

3.What can we learn about polar bears from the passage?

A They like playing with Ivory gulls.

B It’s not easy for them to catch seals.

C They like living in original places.

D They like a little warmer climate.

解析：选B。推理判断题。根据文章第五段第一句I learned that polar bears are successful only one out of every twenty hunting attempts.可知北极熊抓住海豹的几率只有二十分之一，因此可知它们抓住海豹的几率不大，故选B。

4.What can we infer from the last paragraph?

A The Arctic should be protected well by people.

B More people should come to visit the Arctic.

C Enjoying beauty is the greatest award for the author.

D Students On Ice has done much to protect the Arctic.

解析：选A。推理判断题。文章最后一段提到作者参加此次旅行后感到保护北极圈和地球环境非常重要，故选A。