It was clear that the small grocer was _____ people he owed money to.
#28364
A
at the expense of
B
at the risk of
C
in the way of
D
at the mercy of
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It is illegal for a public official (政府官员) to ask people for gifts or money_____ favors(恩惠，帮助) to them.
#26516
A
in place of
B
in agreement with
C
in exchange for
D
in spite of
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
#26213
A
of；at
B
by；in
C
of；on
D
on；at
---Did the naughty boy break the glass by chance? ---No, ________.
#25984
A
of course
B
on purpose
C
by hand
D
for pleasure