单项选择题

He doesn' t come today. He ______ be ill.

A．must
B．can
C．should
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单项选择题
When I got to the airport, the plane ______.
A．already took off
B．had already taken off
C．has already taken off
单项选择题
The car ______ me 100,000 yuan.
A．spent
B．cost
C．took
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