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    ---How well did John do in the match?
    --Wonderful. I think we can’t have a ______ player in our football team.

    A．goodB．wellC．betterD．best

    C

    解析

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    　　Destructive insects in larger numbers are finding Alaska forests to be a comfortable home and climate change could be the wel-come mat.

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    　　Since 1980, spruce bark (树皮) beetles have killed mature white spruce trees on 4. 4 million acres. For lack of two cold winters on end, the numbers of the beetles there blew up while the resistance (抵抗力) of the trees was down at the same time everywhere. Most of the mature trees have been killed in some whole region of the state.

    　　Spruce bark beetles bore into (蛀穿)trunks and feed on the live cambium layer, a thin part of tissue between bark and wood. Trees re-sist beetles with pitch, made up of hydrocarbons including up to 17 forms of terpene (松稀). The rates of those terpenes are a signal of the health of the tree. When a tree is injured, terpene rates go off in one direction.

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    B．Warm Winters and Its Bad Effects

    C．The Way of Spruce Trees' Living in Alaska

    D．Destructive Insects on Rise in Alaska

    (2) According to the text, how do warm win-ters reduce the trees' ability to resist in-sect attacks?

    [　　]

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    When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.

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