单项选择题

Public speaking experts stress that successful ______ of a speech requires a great deal of skill and preparation.

A．deliver
B．delivery
C．deliverable
D．delivered
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单项选择题
The type of exercise recommended varies ______ depending on the age and health condition of the individual.
A．willingly
B．agreeably
C．cordially
D．considerably
单项选择题
Skypass Airlines formally announced that there would be no extra flights between Hong Kong and Madrid ______ the strike.
A．during
B．onto
C．upon
D．for
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