问题补充:
---How clean the window is ! -----Yes ! It just now .
A. has been cleaned
B. was cleaned
C. is cleaned
Dwill be cleaned
答案:
A. has been cleaned
(答案→)B. was cleaned
C. is cleaned
D. will be cleaned
解析: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。