现在完成时的基本用法 — 英语选择题
题目
志愿者刚打扫完活动室，现在房间很干净。哪句话用现在完成时表达已完成的动作及其与现在的联系？A. The volunteers have cleaned the activity room. B. The volunteers cleaned the activity room every day. C. The volunteers clean the activity room now. D. The volunteers are cleaning the activity room.