If each of us does our part little by little, we can______ the lifespan of our planet and ourselves.

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问题 If each of us does our part little by little, we can______ the lifespan of our planet and ourselves.

选项 A、enlarge
B、expand
C、increase
D、grow

答案C

解析 近义词辨析。enlarge“扩大;放大”;expand“扩张;使膨胀”;increase“增加;延长;提高”;grow“发展;生长;渐渐变得……”。句意表达的是寿命的延长,只有increase有“延长”的意思,因此答案选C。
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