单项选择题

A．From the wind.
B．From manpower.
C．From a generator.
D．From rechargeable batteries.
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单项选择题
A．Because they are obliged to make people safe and sound.B．Because they want to solve the problem of’ overcrowding.C．Because people do not leave their bags outside obediently.D．Because people can not get to and from their seats comfortably.
A．Because they are obliged to make people safe and sound.
B．Because they want to solve the problem of’ overcrowding.
C．Because people do not leave their bags outside obediently.
D．Because people can not get to and from their seats comfortably.
单项选择题
A．Reading a book.B．Cooking in the kitchen.C．Getting to the kitchen.D．Showing a book to the woman.
A．Reading a book.
B．Cooking in the kitchen.
C．Getting to the kitchen.
D．Showing a book to the woman.
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