Question

【题目】It ___________ last week that the haze(雾霾) in Beijing caused many problems.
A.reports
B.reported
C.is reported
D.was reported

Answer 1

【答案】D
【解析】主语是it用被动语态，构成It is reported that...据报道......；又有last week，所以时态上是一般过去时,故选D; 句意：据上周报道说北京的雾霾引发了很多问题。