单项选择题

A．There was
B．That was
C．It was
D．Was
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单项选择题
To have a nap during the day ______ according to the text.
A．is important
B．does good
C．is not good
D．is necessary
单项选择题
Caffeine ______ if you want to have a good sleep.
A．should be taken seven hours earlier
B．should not be taken
C．should be taken two or three hours earlier
D．should be taken little
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