In the factory, the helmets the workers wore varied _____ color according to their different posts. 
#26057
A
from
B
in
C
with
D
alongside
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His boss is going to be on vacation next week and the company will be left _______ him.
#27853
A
in charge of
B
in the charge of
C
taking charge of
D
taking the charge of
You’d sound a lot more polite if you make a request _____ a question.
#27182
A
in search of
B
in the form of
C
in need of
D
in the direction of