单项选择题
A．stopped migrating B．continued migrating C．began migrating again D．migrated south and stay there
A．the modern pace B．our interest in shortened operas C．how to make the best use of leisure time D．planning our time scientifically
A．must always be in credit B．can’t draw any money if you’re overdrawn C．can draw money without notice D．can’t pay money to anyone else