The roads are lined _____trees, which have been planted to hold _____the strong winds from the north.
#28956
A
along; to
B
on; up
C
with; back
D
in; against
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___ the help of computers , there are no ___ problems.
#26921
A
Under; so
B
Under; many
C
With ;such
D
With ;some
He didn’t do well _____ Chinese. He had some trouble ______ it.
#27461
A
in, in  
B
for, with
C
with, for
D
in, with