It is five years since my dear aunt _______ here.
A．leftB．has leftC．is leftD．had left
A
since，for作為連詞，引導(dǎo)時(shí)間狀語(yǔ)（從句）如果謂語(yǔ)動(dòng)詞是延續(xù)性的一般過(guò)去時(shí)，其表達(dá)的含義是"從這個(gè)動(dòng)作結(jié)束以來(lái)"，恰好和動(dòng)詞的詞義相反，具有否定的含義；如果謂語(yǔ)動(dòng)詞是非延續(xù)性的一般過(guò)去時(shí)，其表達(dá)的含義是"從這個(gè)動(dòng)作開(kāi)始以來(lái)"，恰好和動(dòng)詞的詞義一致，具有肯定的含義
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