If you are wandering through the busy streets, ______ will most attract you.

A．Amusement at No Cost
B．Movies, Concerts and Shows
C．The Cheapest Window - shopping
D．The Most Enjoyable Street Musicians

A．birds should be taught to navigate
B．a dove that has been caged will not fly long distances
C．some birds cannot fly at night
D．some birds seem to follow the stars when they fly at night