at, for,to; but,while, when U. S. investment in China has amounted _______ nearly US $ 100 billion,_______Chinese investment in

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问题 at, for,to; but,while, when
U. S. investment in China has amounted _______ nearly US $ 100 billion,_______Chinese investment in the U. S. has also grown.

选项

答案to,while

解析 第一个空考查动词和介词的搭配,在教材P377有举例说明。第二个空考查对比状语while的用法。答案为to,while。
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