单项选择题

Malaria is all infectious parasitic disease that can be either acute or chronic and is frequent______.

A．repeating
B．terminal
C．debilitating
D．recurrent
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单项选择题
Although the speaker was a well-known personality, his speech was poorly______.
A．raised
B．delivered
C．lectured
D．preached
单项选择题
it is not considered ______to pick one’ s teeth in public.
A．respectful
B．respected
C．respectable
D．respective
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