Good pencil erasers are soft enough not ______ paper but hard enough so that the

游客2025-02-03 17

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

选项 A、by damaging
B、so that they damage
C、to damage
D、damaging

答案 C

解析 “enough+不定式”(足够……能)结构常置于形容词后作状语，表示结果，本句是这一结构的否定式：所以C是答案。

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