专业、全面、易懂的全领域名词百科

Goodpencilerasersaresoftenoughnot________paperbuthardenoughsothattheycrumblegraduallywhenused.

题型：单选题

选项

A. by damaging

B. so that they damage

C. to damage

D. damaging

正确答案：C

名词解析

语法应用。“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。