单项选择题

Contact your doctor if the cough persists.

A．insists
B．perseveres
C．continues
D．resists
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单项选择题
Jack is a diligent worker.
A．ambitious
B．lazy
C．hardworking
D．clever
单项选择题
From my standpoint, you know, this thing is just ridiculous.
A．position
B．point of view
C．knowledge
D．opinion
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