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The country has been __the border defense in preperation for war.
a)stretch b)stretching c)suggest d)suggested
人气:140 ℃ 时间:2020-04-13 21:20:46
解答
b,意思是这个国家为了准备战争正加强边界防卫.
have been doing,已经正在做某事的意思
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