showed是谓语,showed后面接两个分句.GMAT最讲究平行结构,原句中是showed that + 分句 and 填空.所以and后要接一分句保持平行.分句应以that开头,这在GMAT中很常见.主句是过去时,第一个从句也是过去时,所以第二个从句应该用过去时.所以选E.
一道GMAT语法题the report on the gross national product---the nati
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