We were () the difficulty how to supply food to those in need.
A. faced with
B. met
C. facing with
D. encountered
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This factory is now trying to () a new model.
A. predict
B. turn out
C. work out
D. imitate
This computer is () storing millions of bits of information.
A. able to
B. capable about
C. capable of
D. able of
It's reported that the population in that area has been increasing at a great ( )
A. speed
B. amout
C. rate
D. number
The new system was brought into ( ) in the year when I was born.
A. being
B. reality
C. existence
D. practice