18．        they choose Chinese company is that China has the most advanced technology of high-speed railway in the world．（　�。�
A．WhetherB．WhereC．WhenD．Why

分析 翻譯為他們選擇中國公司的原因是中國擁有世界上最先進的高鐵制造技術(shù)．a(chǎn)dvanced technology最先進的技術(shù)

解答 D．考查主語從句，根據(jù)后文中國擁有世界上最先進的高鐵制造技術(shù)可知是他們選擇額原因，為因果關(guān)系，故選why．

點評 考查主語從句，先通讀整個句子，了解句子大意，再根據(jù)對選項的理解進行選擇．

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