It’s important ___ us to protect the environment and it’s wise ____ us to save water .
#46629
A
for , for
B
of , of
C
for , of
D
of , for
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It’s very convenient ______ us to buy train tickets now because we can buy them either from the station or on the Internet.
#48015
A
to
B
of
C
by
D
for
We must be strict _________ our work and strict _________ ourselves.
#47372
A
with; in
B
in; with
C
in; in
D
with; with