问题标题：
Themotheraskedhersontohelpherbecauseshehad________insendinge-mails．A.somedifficultiesB.manydifficultiesC.adifficultyD.somedifficulty
问题描述：
Themotheraskedhersontohelpherbecauseshehad________insendinge-mails．
A.somedifficulties
B.manydifficulties
C.adifficulty
D.somedifficulty
唐余富回答：
答案Ddifficulty表示“困难”,用作抽象概念,是不可数名词的用法,而用作表示“各种各样的困难”就是可数名词的用法.但在词组中,difficulty用作不可数名词,havesomedifficultyindoingsth表示“做某事有一些困难”...
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