单项选择题

A．Because she has been ill for a week.
B．Because she failed to pass the exam.
C．Because she had an unpleasant experience with a burglar.
D．Because she didn’t sleep well yesterday.
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单项选择题
A．It is cheap and convenient.B．It is time-saving and energy-sparing.C．It is comfortable and safe.D．One can make friends on the bus.
A．It is cheap and convenient.
B．It is time-saving and energy-sparing.
C．It is comfortable and safe.
D．One can make friends on the bus.
填空题
Moblogging services enable users ______.
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