单项选择题

A．They work by motion.
B．They work by electricity.
C．They work by rubbing the food.
D．They work by sending short waves.
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单项选择题
A．Mr. Smith is very kind.B．The woman should not worry.C．He is worried, too.D．He likes Mr. Smith.
A．Mr. Smith is very kind.
B．The woman should not worry.
C．He is worried, too.
D．He likes Mr. Smith.
单项选择题
A．The woman.B．Another stewardess.C．The pilot.D．His neighbor.
A．The woman.
B．Another stewardess.
C．The pilot.
D．His neighbor.
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