单项选择题

A．the unsettledness of travel
B．the difficulties of trekking
C．the loneliness of travel
D．the unfamiliar environment
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单项选择题
A．Amusement.B．Disbelief.C．Ecstasy.D．Delight.
A．Amusement.
B．Disbelief.
C．Ecstasy.
D．Delight.
单项选择题
A．discouragingB．encouragingC．pessimisticD．unexpected
A．discouraging
B．encouraging
C．pessimistic
D．unexpected
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