每日一练：职称英语C级每日一练(2014-12-22)
【单选题】
I had some difficulty in carrying out the plan.
A、making
B、keeping
C、implementing
D、changing
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每日一练：职称英语C级每日一练(2014-12-22)
【单选题】
I had some difficulty in carrying out the plan.
A、making
B、keeping
C、implementing
D、changing
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