题目内容：
At three thousand feet, wide plains begin to appear, and there is never a moment when some distant mountain is not
A．on view B．at a glance
C．on the scene
D．in sight
参考答案：
答案解析：
单选题：At three thousand feet, wide plains begin to appear, and the
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B．at a glance
C．on the scene
D．in sight