Public service advertisements are often run _____ free, and are ______ to educate people about health, safety, or any other issue which affects public welfare.
#26839
A
for, mean
B
for, meant
C
of, to mean
D
in, meaning
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At midnight the enemy attacked _________.
#28619
A
without warning
B
without notice
C
without permission
D
A or B
--- Is this book familiar ______ you? --- Sure. I am also familiar ______ its writer.
#25475
A
to; to
B
with; with
C
to; with
D
with; to
He earned enough money to start his own business _____ offering guide services _____ tourists.
#28957
A
by; to
B
with; at
C
on; for
D
through; with
They were arguing _____each other _____ the cause of SARS．
#26632
A
about; with
B
to; about
C
with; to
D
with; about
______giving a general introduction to computer, the course also provides practical experience.
#29198
A
In exchange for
B
Except for
C
In addition to
D
Due to