单项选择题

A couple of minutes earlier, ______ we could have been able to hear his speech.

A．and
B．on
C．but
D．so
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单项选择题
______ in the earthquake thoroughly, the city has now been rebuilt.
A．Destroying
B．Having destroyed
C．Destroyed
D．To be destroyed
单项选择题
______ scientist and ______ pianist ______ been invited to the New Year' s Eve reception given by the government.
A．The... the... have
B．The... ×... have
C．The... ×... has
D．×... the... has
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