A-A+
A．Broadcasting frightened sounds of the birds
问题详情
A．Broadcasting frightened sounds of the birds to scare them away.
B．Making shooting sounds to scare the birds away.
C．Hiring special workers to drive them away.
D．Capturing them and then transporting them away.
参考答案
正确答案：A
解析：本题问的是科学家用什么方法驱赶飞鸟。从短文中可以听到科学家将“broadcast bird‘distress calls’over loudspeakers”，而且进一步提到这种‘distress calls’为“the sound that these birds make when there is danger”，听到危险时发出的遇险呼叫。因此，选项A为正确答案。
