单项选择题

He ______ ten lectures on African literature, but he only gave three because of his illness.

A．must have given
B．should have given
C．gave
D．had given
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The curator of the, Moth Museum was ______ and let us actually examine those invaluable samples.
A．promising
B．agreeing
C．inspiring
D．obliging
单项选择题
I'm one of. the students ______never later for school.
A．that is
B．who are
C．who am
D．who is
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