—Where is Mother?
—She is in the kitchen. She ______the housework all morning.
A． does B．has been doingC．has doneD．was doing
B  

試題分析：句意：--媽媽在哪里？--她在廚房，她一個(gè)早上都在做家務(wù)。表示母親一上午都在做家務(wù)，現(xiàn)在仍在廚房做，故應(yīng)用現(xiàn)在完成進(jìn)行時(shí)，表示從過(guò)去至今一直在持續(xù)的動(dòng)作。選B。
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