___is certain is ___prevention is more important than treatment .
#73499
A
It;that
B
What;that
C
As;what
D
What;what
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In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets. 
#74659
A
that some scientists say
B
in which some scientists say
C
some scientists say that
D
some scientists say
 He asked _____________ for the violin. 
#74037
A
did I pay how much
B
I paid how much
C
how much did I pay
D
how much I paid
Many experts agree that there is a possibility___ in this area in the following days.
#69074
A
when some more earthquakes may happen
B
that some more earthquakes may happen
C
where may some more earthquakes happen
D
what may some more earthquakes happen