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單項(xiàng)選擇題

He gave us a good（）of his experience.

A.demonstration
B.frequency
C.description
D.instruction

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單項(xiàng)選擇題

This mountain range has many high（）and fertile valleys.

A.peaks
B.hills
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單項(xiàng)選擇題

His proposal is（）to all of us and you do not need to tell us more about it.

A.apparent
B.appearing
C.approaching
D.apart