单项选择题

The author believes that everything in your pack should ______.

A．be lightweight
B．serve an important purpose
C．serve several purpose
D．keep the pack warm
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单项选择题
According to the passage, if you were camping in 10℃ weather and the temperature dropped to 10℃ below zero, you could compensate for this by______.
A．sleeping in a tent with special layers of clothing
B．sleeping in a tent on the side of a hill
C．sleeping on the side of a hill
D．sleeping on the side of a hill out of the wind
单项选择题
According to the passage, it would be more advantageous to pack ______.
A．a light sleeping hag, pants and shorts, a heavy jacket, and a shirr
B．a light sleeping bag, two pairs of pants, and a heavy jacket
C．a light sleeping bag, two pairs of pants, and a light sweater and shirt
D．a light sleeping bag, pants and shorts, and a light sweater and shirt
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