单项选择题

He acted as though nothing（）

A．was happening
B．had happened
C．has happened
D．happened

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单项选择题
Being a pop star can be quite a hard life, with a lot of traveling（）heavy schedules.

A．as m
B．in relation to
C．owing to
D．with regard to
单项选择题
Such electronic devices（）are used in a radio set can also be found in a computer.

A．in which
B．that
C．which
D．as
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