Many chemical substances react________oxygen. 
#25154
A
on
B
with
C
against
D
to
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Facing the dangerous situation, he was completely______.
#26634
A
at loss
B
at a loss
C
out of order
D
out of sight
 I asked him what he hoped _____ his birthday.
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A
on on
B
at at
C
to to
D
for for
— David, how is your new job?— ________ the salary, it’s not bad.
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A
Besides
B
Apart from
C
In addition to
D
As well as