单项选择题

Paul doesn't have to be made ______. He always works hard.

A．study
B．to study
C．studied
D．studying
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单项选择题
It's nearly seven o'clock. Jack ______ be here at any moment.
A．must
B．need
C．should
D．can
单项选择题
In some parts of the world, tea ______ with milk and sugar.
A．is serving
B．is served
C．serves
D．served
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