He was unable to make such progress, __________________.
A．a(chǎn)s he tried hardB．a(chǎn)s hard he triedC．so hard did he tryD．hard as he tried
D

試題分析：考查as引導(dǎo)的倒裝句。當(dāng)as放在名詞，形容詞，副詞的后面，句子使用倒裝句。本題hard as he tried="Though" he tried hard.盡管他很努力了。。。。
點評：本題重在掌握as“盡管”時可引起倒裝，同時although引導(dǎo)讓步狀語從句時不能倒裝，as引導(dǎo)讓步狀語從句時必須倒裝，而though引導(dǎo)讓步狀語從句時可以倒裝也可以不倒裝。
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