_________ caused the accident is still a mystery.
#30978
A
How
B
What
C
That
D
Where
推荐题目
Stand over there ________ you'll be able to see the oil painting better.
#30478
A
but
B
till
C
and
D
or
Telephone users sometimes complain about unreliable service and they consider unfair charges.
#30607
A
which
B
that
C
what
D
how
There was a fierce debate about _____we should go on with experiments on creating new life.
#31744
A
which
B
whether
C
that
D
What
The question came up at the meeting_____ we had enough money for our research.
#32098
A
that
B
which
C
whether
D
that if