单项选择题

A．Big waves pose a threat to commercial navigation.
B．The fiver current never flows faster than ten miles per hour.
C．The fiver reverses its flow several times a day.
D．High tides can create sudden and unexpected rapids.
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单项选择题
A．She would prefer a more expensive model. B．She’s confused by the remote controls. C．She’s eager to use it D．She thinks it unwise to buy it.
A．She would prefer a more expensive model.
B．She’s confused by the remote controls.
C．She’s eager to use it
D．She thinks it unwise to buy it.
单项选择题
A．She doesn’t understand it either. B．She can’t see the writing on the board. C．She thinks the room is too dark. D．She didn’t really notice the mark.
A．She doesn’t understand it either.
B．She can’t see the writing on the board.
C．She thinks the room is too dark.
D．She didn’t really notice the mark.
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