【題目】High-speed railways have developed rapidly in our country. Today China has ______ high-speed rail network (鐵路網(wǎng)) among the countries in the world.

A.longB.longerC.the longerD.the longest

【答案】D

【解析】

句意：高鐵在我們國家發(fā)展很迅速�，F(xiàn)在世界上其他國家中國有最長的鐵路網(wǎng)。

考查形容詞比較級。long長的；longer更長的；the longer定冠詞加比較級；the longest最長的。根據(jù)“among the countries in the world”可知此處把中國與世界其他國家進行比較，用最高級the longest。故選D。

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