In   Britain,sales of cigarettes have been reduced __________ 30% in the past ten years.
#28450
A
for
B
to
C
from
D
by
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We are paid _____ how much work we do. 
#25921
A
by
B
according to
C
because of
D
with
It’s not early so you’d better start ______.
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A
on time
B
right away
C
at present
D
for the present
The discovery of these tombs is _______ for scholars’ studying the history of the Tang Dynasty.
#27491
A
of very important
B
great importance
C
of great significance
D
great significant