单项选择题

If ever again ______ happens an accident like this, we will have only ourselves to blame.

A．it
B．so
C．there
D．that
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单项选择题
The man in the corner confessed to ______ a lie to the manager of the company.
A．have told
B．be told
C．being told
D．having told
单项选择题
Somebody in the next room must be ill, ______ a doctor has just come out.
A．because
B．for
C．in that
D．as
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