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1.Corn originated in the New World and thus was not known in

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1.Corn originated in the New World and thus was not known in Europe until Columbus found it ( )in Cuba.
A.being cultivated B.been cultivted C.having cultivated D.cultivating
2.This kind of glasses manufactured by exerienced ctaftsmen ( )comfortable.
A.is worn B.wearn C.wearing D.are worn
3.The words of his old teacher left a ( )impression on his mind .He is still influenced by.
A.long B.lively C.lasting D.liberal
晕,貌似第一道题N年前我做过的!
1,A. find后接名词或动名词,由于corn是被种植,所以选A.
2,D. 这里的迷惑点在于kind是单数,glasses是复数形式,那么系动词应该是单数还是复数呢?答案是复数,因为一个种类的眼镜为数众多,肯定还是复数.
3,C.词义辨析,很简单,强调一个持续的影响.