___________ caused the accident is still a complete mystery.
#73942
A
What
B
That
C
How
D
Where
推荐题目
If you are traveling_______the customs are really foreign to your own, please do as the Romans do.
#74347
A
in which
B
what
C
when
D
where
（湖南省怀化市2014年高三第二次模拟考试）25. ______ all of you are top students, only one will be chosen for the coming competition.
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A
While
B
Since
C
If
D
As
It is not always easy for the public to see _______ benefit a new invention can be of to human life.
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A
whose
B
what
C
which
D
that
The clock was striking twelve ______ down the street.
#74557
A
because I walked
B
as I walked
C
since I was walking
D
while I was walking