【題目】Our world changed a lot in ____century.

A. the twentiethB. twentieth

C. the twenty

【答案】A

【解析】

句意:二十世紀(jì)我們的世界發(fā)生了很大的變化。

考查序數(shù)詞。在幾世紀(jì),使用序數(shù)詞,序數(shù)詞前一般用定冠詞thetwenty:二十,序數(shù)詞是twentieth,in the twentieth century:在二十世紀(jì);故選A。

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