问题
选择题
---How clean the window is ! -----Yes ! It _______ just now .
A．has been cleaned
B．was cleaned
C．is cleaned
D． will be cleaned
答案
答案：B
题目分析：has been cleaned（现在完成时）被打扫过； was cleaned（一般过去时）被打扫了；is cleaned（一般现在时）被打扫；will be cleaned（一般将来时）将被打扫。原句意思是：窗子多么干净啊！是啊，它刚才被打扫了。Just now是过去时的时间状语，本句不能用现在完成时。故选B。