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單項(xiàng)選擇題

Pipes made of plastic are now widely used in building as they are light and do not become （）in water.

A.ripe
B.instant
C.rotten
D.mature

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單項(xiàng)選擇題

They were under the（）that the company was doing well, but in fact it was in serious trouble.

A.conclusion
B.expression
C.enjoyment
D.illusion

單項(xiàng)選擇題

This lovely old town has a（）you couldn't find in a big city.

A.condition
B.standard
C.situation
D.charm

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