---What a nice MP3! How long ______ you ______ it?  ---Only two days.

A．have, bought B．did, buy
C．have, had D．a(chǎn)re, having

C

解析試題分析：句意：多么好的一個(gè)MP3。你買這個(gè)多久了？僅僅兩天。現(xiàn)在完成時(shí)可以用來表示發(fā)生在過去某一時(shí)刻的,持續(xù)到現(xiàn)在的動(dòng)作（用行為動(dòng)詞表示）或狀態(tài)（be動(dòng)詞表示）常與for（+時(shí)間段）,since（+時(shí)間點(diǎn)或過去時(shí)的句子）連用. 現(xiàn)在完成時(shí)中，非延續(xù)性動(dòng)詞不能與for和since引導(dǎo)的表示一段時(shí)間的狀語連用，通常是用相應(yīng)的延續(xù)性動(dòng)詞來代替。buy 對(duì)應(yīng)的延續(xù)性狀態(tài)詞是have。故選C
考點(diǎn)：考查現(xiàn)在完成時(shí)態(tài)的用法。

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