单项选择题
A．Riding a horse. B．Taking a photo. C．Shooting a movie. D．Playing a game.
A．The heart of London was flooded. B．An emergency exercise was conducted. C．100 people in the suburbs were drowned. D．One of the bridges between North and South London collapsed.
A．It limited their supply of food. B．It killed many baby bald eagles. C．It destroyed many of their nests. D．It made their eggshells too fragile.