Question

【题目】— What a clean and clean and bright classroom, isn't it?
— Yes, it's always clean and bright because it _________ every day.
A.cleans
B.cleaned
C.is cleaned
D.was cleaned

Answer 1

【答案】C
【解析】句意：——多么干净明亮地教室啊，是吗？——是的，他总是干净明亮是因为每天打扫它。it指教室，与clean之间构成被动关系，故用被动语态。every day是一般现在时的标志，故选C。