(2014·安徽蚌埠第一次教学质量检查)Finding information in today’s world is easy.The  ________is how you can tell if the information you get is useful or not.
#10630
A
knowledge 
B
ability
C
competition 
D
challenge
推荐题目
I could hear voices but I couldn’t ______ what they were saying.
#12579
A
turn out
B
pick out
C
work out
D
make out
He spent __________ money on books and _________ his books are about space and satellites. 
#14317
A
a great deal of; a good many of
B
a good many; a great number of
C
a great number of; a large amount of
D
quantities of; a quantity of
 We must apply our minds to ________a solution.
#13045
A
find
B
finding
C
found
D
being found