单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Bill is more cheerful than John.
B．John is more intelligent than Bill.
C．Bill is much nicer than John.
D．John is friendlier than Bill,

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Step Four mentions that trails are usually in logical places, try to seek trails near ______.

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The passage in Step Three suggests that it’s a good idea to leave markers, or a sign to ______.

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。