pureradium(L.2)[语言点]what引导的名词性从句在句中作表语。它还可5.Cavepaintingshavebeenfoundwhichareatleast20,000yearsold......

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1．as for;as for是固定词组，意思是“就……而言；至于”，其后常接名词，代词，且常位于句首。请看例句：......

[原句1]-How often do you watch TV？-Twice a week．（P．2）...

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