此處應(yīng)用過去時(shí).
just now作“剛才”、“一會(huì)兒之前”解時(shí),常與一般過去時(shí)連用,位于句首或句末；它也可指“（加重語氣的）現(xiàn)在”或“片刻之后”,這時(shí)可用于現(xiàn)在時(shí)或?qū)頃r(shí).如：
They gave it to me just now．他們剛才把它給了我.
I'm busy just now．我現(xiàn)在很忙.
I'll tell you a story just now if you have time to listen to it．
如果你有時(shí)間,我馬上就把故事講給你聽.
just now 有三種含義：
1、at this moment 此時(shí)、此刻、眼下
Come and see me later,I'm busy just now!
過些時(shí)候再來,我這會(huì)兒正忙著呢!
2、during this present period 目前；現(xiàn)階段
Business is good just mow.
目前生意很紅火.
3、onlu a short time ago 剛才；剛剛；一會(huì)兒前
I saw her just now.
我剛剛見到過她.
因此此處應(yīng)用過去式finished.