单项选择题

A．The advanced equipment in the laboratory.
B．The so-early start-working hour.
C．The terrible working habit of his colleagues.
D．The interval between the start-working hours of two places.
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单项选择题
A．Enough food for a week.B．A sleeping bag and a raincoat.C．Hiking boots and bathing suit.D．A camping tent.
A．Enough food for a week.
B．A sleeping bag and a raincoat.
C．Hiking boots and bathing suit.
D．A camping tent.
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