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1.Our foreign trade has expanded greatly in recent years.

分析 我们的外贸在近几年快速地发展.

解答 答案:expanded.主语为our foreign trade我们的外贸,在近几年应为快速扩张(发展),根据语境,故为expand,而has表明为现在完成时,故填expand的过去分词expanded.

点评 本题考查动词expand及现在完成时的用法.

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