16[单选题,1.3分] If the market is left ____________, there will sometimes be shortages or over-production. A.to be run B.to run itself C.running by itself D.running

16[单选题,1.3分] If the market is left ____________, there will sometimes be shortages or over-production.
A.to be run
B.to run itself
C.running by itself
D.running

出自：河南大学-本科英语

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