单项选择题

I am feeling sick, I ______ so much chocolate.

A．needn't have eaten
B．couldn't have eaten.
C．mustn't have eaten
D．shouldn't have eaten
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单项选择题
Robert Fulton’s invention, an airphibian, can best be described as （）

A．a helicopter
B．a solo flying machine
C．a flying car
D．an airplane
单项选择题
Paul Moller’s flying car is different than an airplane because （）.

A．it has no wings
B．it uses solar power
C．it takes off and lands vertically
D．it can land on water
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