With a population of over seven million, London is the largest cities of the world.
A. between
B. among
C. from
D. of
网友回答
A. between
(答案→)B. among
C. from
D. of
解析：考查介词：A. between在（两者）之间，B. among在（三者以上）之间，C. from 来自， D. of…的，句意：有着超过三百万的人口，伦敦现在在世界最大的城市之一。选B。