A-A+
A．To fly one following another.B．To fly withou
问题详情
A．To fly one following another.
B．To fly without stopping.
C．To use land features as the guide.
D．To take one route only.
参考答案
正确答案：C
解析：此题的问题是："What is the most straightforward method for the birds to use to find their way?"由于文中根本未提到A、B、D，则可用排除法直接选定C为答案。
