单项选择题

Buses ______ very crowded, we had to go to school by taxi.

A．having been
B．are
C．being
D．were
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单项选择题
Henry's ideas are invariably condemned as ______ by his colleagues.
A．ingenious
B．theoretical
C．impractical
D．imaginative
单项选择题
He would never forget the occasions in the past ______ he had been bullied and humiliated.
A．that
B．before
C．which
D．when
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