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單項(xiàng)選擇題

As the ocean water changes to ice, it keeps the temperature（）falling too far.

A.with
B.into
C.besides
D.from

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單項(xiàng)選擇題

You must obtain（）from the landowner to fish in this river.

A.permission
B.omission
C.celebration
D.graduation

單項(xiàng)選擇題

It seemed as if all of a（）the animal had smelt danger in the air.

A.sudden
B.moment
C.minute
D.once

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