单项选择题

A．Partly because they sleep in one long block.
B．Partly because they take one or two naps daily.
C．Partly because they sleep in three distinct parts.
D．Partly because they have many five-minute naps.
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单项选择题
A．Family debts.B．Bank savings.C．Monthly bills.D．Spending habits.
A．Family debts.
B．Bank savings.
C．Monthly bills.
D．Spending habits.
单项选择题
A．Tom is always late.B．Tom will not show up.C．Tom is usually on time.D．Tom will be there at 8:30.
A．Tom is always late.
B．Tom will not show up.
C．Tom is usually on time.
D．Tom will be there at 8:30.
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