---How clean the window is ! -----Yes ! It _______ just now .
A．has been cleanedB．was cleanedC．is cleanedD． will be cleaned
B

試題分析：has been cleaned（現(xiàn)在完成時）被打掃過； was cleaned（一般過去時）被打掃了；is cleaned（一般現(xiàn)在時）被打掃；will be cleaned（一般將來時）將被打掃。原句意思是：窗子多么干凈��！是啊，它剛才被打掃了。Just now是過去時的時間狀語，本句不能用現(xiàn)在完成時。故選B。
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