单项选择题

The president spoke at the business meeting for nearly an hour without______his notes.

A. bringing up
B. referring to
C. looking for
D. trying on
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单项选择题
When climbing the hill, John was knocked unconscious by an______rolling stone.
A. untouched
B. unfamiliar
C. unexpected
D. unbelievable
单项选择题
Her brother______to leave her in the dark room alone when she disobeyed his order.
A. declared
B. threatened
C. warned
D. exclaimed
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