单选题 The police inspector, having received new information from a confidential source, decided to enlarge the ______ of his enquiry.
A. scope B. magnitude C. dimension D. volume

【正确答案】 A
【答案解析】(scope活动范围)。句意为：那位巡官从秘密渠道弄到新的线索以后，决定扩大调查范围。B．magnitude巨大，重大；C．dimension方面；D．volume容积，音量。