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

分析 我們的外貿(mào)在近幾年快速地發(fā)展．

解答 答案：expanded．主語(yǔ)為our foreign trade我們的外貿(mào)，在近幾年應(yīng)為快速擴(kuò)張（發(fā)展），根據(jù)語(yǔ)境，故為expand，而has表明為現(xiàn)在完成時(shí)，故填expand的過(guò)去分詞expanded．

點(diǎn)評(píng) 本題考查動(dòng)詞expand及現(xiàn)在完成時(shí)的用法．

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