None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have.
?? None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have. ?? (A) have ?? (B) has ?? (C) shall ?? (D) do ?? (E) could
有个比较二的问题,后一个why从句,能否写成so many of those not so exposed to the alleged causes do commit crimes,如果可以,为什么省略的是to the alleged causes而不只是省略the alleged causes保留to