___________ caused the accident is still a complete mystery. 
#73942
A
What
B
That
C
How
D
Where
推荐题目
--- Whom should I give this dictionary to? --- You may give it to ______.
#70367
A
whoever you think needs it most
B
whomever you think needs it most
C
anyone needs it most
D
someone who needs it most
Could you drive me to the supermarket after supper if _________________?
#67702
A
it is convenient of you
B
you are convenient
C
it is convenient to you 
D
you will be convenient
Actually,       works hard can be      they want to be, whether it is a pilot, an engineer or a manager.
#69166
A
anyone; whoever
B
no matter who; whoever
C
whoever; no matter what
D
whoever; whatever