单项选择题

Passage One

A．Leukemia.
B．Gastric ulcer.
C．Immune disease.
D．Gastric influenza.
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单项选择题
A．Sleeping in 8-hour consolidated blocks.B．Sleeping during day time.C．Going to bed soon after dark.D．Two blocks of 4-hour sleep with a waking break.
A．Sleeping in 8-hour consolidated blocks.
B．Sleeping during day time.
C．Going to bed soon after dark.
D．Two blocks of 4-hour sleep with a waking break.
单项选择题
A．his own B．our own C．your own D．her own
A．his own
B．our own
C．your own
D．her own
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