【正确答案】 D

【答案解析】bounce意为“(使)弹起，(使)反弹，(使)颠跳”，同jump，例如：The rest of the tile bounced on the roof and slithered down and off it其余的瓦在屋顶上弹跳着，然后沿屋顶滑下，摔落下去。sway意为“摇摆，摇动”，例如：Only those who are not easily swayed by their motions are fit for the job． 只有那些不易受自己的感情所左右的人才适合这一工作。hop意为“(人)单足跳跃，单足跳行； (鸟、昆虫等)齐足跳跃，齐足跳行”，例如：She hopped across the room because she had hurt her foot．她用一只脚单跳着穿过房间，因为她的脚受伤了。dart意为“猛冲，飞奔”，同dash，rush，例如：Swallows were darting through the clouds．燕子穿云急飞。