It is very kind _____ you to help me with my lessons. It is difficult _____me to learn them well.
#51240
A
of , of
B
for , of
C
of , for
D
for , for
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The robber was caught by two men ______ police uniform _________.
#51266
A
in; at the once
B
in; at once
C
on,; at the once
D
on; at once