单项选择题

So many directors_____, the board meeting had to be put off.

A．were absent
B．been absent
C．had been absent
D．being absent
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单项选择题
A ______to this problem is expected to be found before long.
A．result
B．response
C．settlement
D．solution
单项选择题
He''s watching TV He''s ______to be cleaning his room.
A．known
B．supposed
C．regarded
D．considered
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