摘要： In the poor parts of America's big cities there is a lot of crime, . A. and many more is serious B. much of it is serious C. and much of it is serious D. more of it is serious
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In the poor parts of America's big cities there is a lot of crime, _____ .
A．and many more is serious B．much of it is serious
C．and much of it is serious D．more of it is serious
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