2. 外语
  3. We are high in the Blue Ridge Mountains in the state of North Carolina. It is very early in the morning. We have been【C1】______

We are high in the Blue Ridge Mountains in the state of North Carolina. It is very early in the morning. We have been【C1】______

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问题     We are high in the Blue Ridge Mountains in the state of North Carolina. It is very early in the morning. We have been【C1】______ in the mountains for almost one week. Each night we sleep in a small cloth【C2】______ called a tent. We carry the tent, sleeping bags, clothes, food and water with us in our【C3】______ . The air this morning is fresh and clear. It smells like green trees and wild flowers. Our【C4】______ are dark green. We have been deep in the forest for many kilometers.【C5】______ light reaches here. It is so【C6】______ with trees we cannot see the sky. At last we come to a【C7】______ area. We can see the sky and the land around us. When we look across to other mountains it is easy to see why they were【C8】______ the " Blue Ridge Mountains". The early morning air in the distance looks like thick smoke. It makes the color of the mountains a deep ocean blue. This color is caused by the amount of water in the air. It is almost like【C9】______ . When the sun rises higher, some of the water in the air will be burned away. Then the mountains will【C10】______ turn dark green. It is beautiful here. We can see many kilometers down and across the valley floor.
A)backpacks I)rainbow
B)clear J)shelter
C)covering K)slowly
D)fog L)surroundings
E)immediately M)thick
F)Little N)trucks
G)named O)walking
H)outskirts
【C1】
选项
答案O
解析 此处是现在完成进行时，缺少现在分词。根据语义，此处是指在山中行进，所以O)正确。
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大学英语四级

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