现在完成时的基本用法 — 英语选择题
题目
志愿者Mia已经把所有捐赠的食物装好，现在可以送出了。选择最恰当地表达“动作已完成且结果与现在有关”的句子。A. Mia packed all the donated food yesterday. B. Mia has packed all the donated food. C. Mia packs all the donated food every week. D. Mia is packing all the donated food now.