单项选择题

Good pencil erasers are soft enough not （） paper but hard enough so that they crumble gradually when used.

A. by damaging
B. so that they damage
C. to damage
D. damaging

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单项选择题
The students are attracted by the （）of the snow-covered mountains when they look out of the train.

A. notability
B. nobility
C. majesty
D. visibility
单项选择题
Because of the strong sun the new sitting-room curtains have（）from dark blue to grey.

A． fainted
B． bleached
C． paled
D． faded
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