题目内容
Since we are in the same team now and we do want to win, we should be _________, helping each other.
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These books attempt to _________ why that is, and what, if anything, should be done about it.
Each person's signature is ________. For example, my signature is different from anyone else’s.
His business went under because of _________ from the large corporations (公司).
With the changes in the world's climate (气候), dinosaurs died, but many smaller animals lived on. It was the _________ of the fittest.
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