题干
It ___________ last week that the haze(雾霾) in Beijing caused many problems.
A：reports
B：reported
C：is reported
D：was reported
答案(点此获取答案解析）
D
It ___________ last week that the haze(雾霾) in Beijing caused many problems.
A：reports
B：reported
C：is reported
D：was reported
