单项选择题
She (came acorss) three children sleeping under a bridge.（）
A．passed by B．took a notice of C．woke up D．found by chance
单项选择题 Rumors began to (circulate) about his financial problems.（）
单项选择题 These animals (migrate) south annually in search of food.（）
单项选择题 It seemed (incredible) that he had been there a week already.（）
