单项选择题

It is implied that lightweight aluminum-frame packs ______.

A．are better than woven pack basket
B．are better than wool-filled sleeping bags
C．are as good as canvas tents
D．are as good as down-filled sleeping bags

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单项选择题

Paragraph 3 mainly talks about ______.

A．what kind of sleeping bags are suitable for winter campers
B．how winter campers should keep themselves warm and safe
C．what kind of material can protect campers from wet weather
D．what kind of equipment for shelter and sleep a camper should bring along

单项选择题

According to the Passage, whether it is cold or warm, ______.

A．the right kinds of tents are the most important
B．the right kinds of clothes are the most important
C．it is the most important to keep warm and safe
D．it is important to bring a down-filled sleeping bag