It took us several hours to make the old man ________ of the safety of travelling by air.
#10892
A
believed
B
convinced
C
informed
D
persuaded
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Paper produced every year is       the world’s production of vehicles.
#14514
A
the three times
B
three times the weight of
C
as three times heavy as
D
three times as heavier as
We always keep ____ gas in case we run out.
#14319
A
a great number of
B
plenty of
C
much too
D
a good many