这题为什么选C?
23.Hepracticedasoftenashecould________hisspokenEnglish.A.improveB.improvingC.toimprov...
23.He practiced as often as he could________ his spoken English.
A. improve B. improving C. to improve D.improved
这题为什么选C? 展开
A. improve B. improving C. to improve D.improved
这题为什么选C? 展开
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