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

分析 我們的外貿在近幾年快速地發(fā)展．

解答 答案：expanded．主語為our foreign trade我們的外貿，在近幾年應為快速擴張（發(fā)展），根據語境，故為expand，而has表明為現(xiàn)在完成時，故填expand的過去分詞expanded．

點評 本題考查動詞expand及現(xiàn)在完成時的用法．

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