问题补充:
All of Manhattan, parts of Brooklyn and Queens are blacked out, and people have no idea it’s coming back on.
A. that
B. when
C. how
D. where
答案:
A. that
(答案→)B. when
C. how
D. where
解析:四个选项分别表示定语从句,时间状语从句,方式状语从句和地点状语从句。整句话大概意思是:在整个曼哈顿岛上,布鲁克林和皇后区的部分地区被封闭了,人们不知道何时(WHEN)恐怖分子会再次来袭。故选B。