单项选择题

______ badly he had slept; he was always up early.

A．No matter
B．Whenever
C．However
D．Even when
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单项选择题
Vitamin E is
A．very popular among some people.
B．effective in memory enhancement.
C．very helpful to the elderly actions.
D．destructive in aging and cancers.
单项选择题
You won't get there on time ______ you set off right now by air.
A．unless
B．even
C．in case
D．other than
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