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 In the experiment we kept a watchful eye ________ the developments and recorded every detail.
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A
in
B
at
C
for
D
on
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After we talked about it for a long time, he agreed to help us ______.
#26298
A
at an end
B
in the end
C
as usual
D
at present
It was my birthday, so all the drinks were      me．
#25390
A
with
B
in
C
on
D
after
Every evening the students go to bed at 10:30______ and the lights are turned off.
#25988
A
at once
B
on purpose
C
at present
D
as usual
 What’s your attitude ______ the disabled people?
#26225
A
towards
B
of
C
over
D
on
Frank was offered a job in a bank, but________our surprise, he didn't take it.  (      )
#25451
A
to
B
at
C
for
D
in