---Look! The telephone is broken. Someone damaged it ________ purpose.---That may be right. But perhaps it was broken _________ accident.
#26390
A
on; by
B
by; by
C
on; on
D
by; on
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Many chemical substances react________oxygen. 
#25154
A
on
B
with
C
against
D
to
Do you know that girl ?The one ___red.
#28139
A
having
B
wearing
C
in
D
putting on
   ______hearing the news that a hurricane was______, most of the people hurried to safer places.
#26342
A
In, on the way
B
Upon, on the way
C
On, in the way
D
As soon as, in this way