问题

Nobody knows ______ yesterday.
A:how the accident happens
B:how does the accident happen
C:how the accident happened
D:how did the accident happen
B:how does the accident happen
C:how the accident happened
D:how did the accident happen
正确答案是:
同类题型
He is giving ______ some presents.
Where is London? I have a pen pal there. —It’s ________ England.[ ]
I have two sisters. One is a doctor, _______ is a teacher.
How are you getting on with your work?—I can’t do it any longer. I’ll have to get help.
The match is really interesting.—Yeah. I think everyonewatched it will remember it forever.