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　　There are two opposing theories about mountain formation and climate over the past 40 million years: either the surge of mountain building (i)______ the global cooling, or vice versa. The first of these two theories asserts that widespread mountain building cooled the earth as a result of the(ii)______ mountains and climate. For example, mountain glaciers tent to be (iii)______: once established, they increase the reflectivity of the surface, thus lowering temperatures and allowing more ice to form.

　　Blank (I)Blank (II)Blank (III)

　　A：superseded D：disparity between G：unpredictable

　　B：halted E： feedback between H：static

　　C：caused F：complexity of I：self-perpetuating

　　答案：CEI

　　If giant x-ray flares churn circumstellar disks enough to keep newborn planets, such as Earth once was, from spiraling into their suns, it would be an ironic twist on our conception of x-ray flares as ______.

　　A：dangerous

　　B：predictable

　　C：ancient

　　D： ephemeral

　　E：perilous

　　F：foreseeable

　　答案：AE

　　Despite their cultural and social significance, rapid growth, and widespread appeal in China,video game—unlike traditional media—have received ______ attention from international communication researches.

　　A： undue

　　B：scant

　　C： excessive

　　D： focused

　　E： limited

　　F：dwindling

　　答案：BE

　　Although Wynne claims to recognize that ______ evidence is available to make definitive statement, she offers them nonetheless, arriving at some sweeping generalizations.

　　A： concrete

　　B： finite

　　C： insufficient

　　D： indirect

　　E： conclusive

　　F：meager

　　答案：CF

　　Although the biography never explicitly assesses what role the dynamic between Mr. Merrills parents might have played in the development of his personality, the author offers plenty of ______.

　　A：mystification

　　B： elucidation

　　C：speculation

　　D： reflection

　　E：obfuscation

　　F：conjecture

　　答案：CF

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