—That must have been a lot of work.
—Yeah, it      us three days to finish it.
A.takesB.had takenC.tookD.was taking
C

試題分析:句意:那肯定有很多工作要做。是的,完成它花費了我們?nèi)斓臅r間。must have been表示對過去的肯定推測,可知事情發(fā)生在過去,現(xiàn)在已經(jīng)完成了,動作不再持續(xù),只表示過去的某個動作,故選C
點評:1.一般過去時表示過去某個時間發(fā)生的事、存在的狀態(tài)或經(jīng)常發(fā)生的動作。說話的側(cè)重點只在于陳述一件過去的事情,不強調(diào)對“現(xiàn)在”產(chǎn)生的影響。2. 現(xiàn)在完成時表示動作發(fā)生在過去,對現(xiàn)在造成了影響或產(chǎn)生了結(jié)果。不與確定的過去時間狀語連用。另外,一般過去時通常與表示過去的時間狀語連用。如:yesterday, last week, two years ago, just now, in 2002等;而現(xiàn)在完成時則常與just, already, ever, never等副詞和these days, this week, since..., for...表示一段時間的狀語連用。
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