单项选择题

The __________ of X-rays in 1895 was an important development in the history of medicine.

A．discovery
B．invention
C．arrival
D．origin
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单项选择题
The lady was __________ of the quality of the service.
A．entrusted
B．assured
C．confirmed
D．guaranteed
单项选择题
As far as __________, October is the best time for your holiday.
A．I see
B．I think
C．I’m concerned
D．it goes
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