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No potatoes for me—I’m _______ a diet. 
#27318
A
at
B
in
C
on
D
with
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We make sure we’re always well stocked up with candles, just ________.
#28861
A
in case
B
for certain
C
in practice
D
for use
I’ve had enough of my boss. He is rather too hard ___________ me.   
#26211
A
for
B
at
C
on
D
in
The hostess left the money on the table _____purpose to test the honesty of her maid.
#27162
A
with
B
in
C
on
D
for
 Dorothy works very hard ；she shows a very positive attitude            her work.
#27185
A
to
B
with
C
of
D
about
He realized she was crying ________ his words.
#26246
A
because
B
because of
C
as
D
since