中考真题2024年四川省资阳市完形填空B篇-牙齿敏感：成因与预防之道
Why do our teeth become sensitive (敏感的)? When you drink cold water, your teeth may have a(n) ___1___ feeling. If you’ve ever experienced this feeling, you may have sensitive ___2___. Actually, millions of people around the world ___3___ this common problem.
People with sensitive teeth may have feelings of pain when they ___4___ or drink something cold, hot, sour or sweet. Sometimes even a deep ___5___ of cold air can make you experience pain.
Scientists have found that some reasons can ___6___ you to have sensitive teeth. ___7___, brushing your teeth too hard can hurt the enamel (牙釉质) on your teeth. Foods that are acidic (酸性的), such as lemons and tomatoes, can also ___8___ enamel over time.
There are a number of ways to help to reduce the pain ___9___ your teeth are sensitive. It will be helpful to use a soft toothbrush and to brush your teeth carefully and ___10___. Watching what you eat and drink can help, too.
1.1.
A uncomfortable
B unfair
C hot
D funny
解析：选A。A。 喝冷水导致牙齿不适，应选描述负面感受的词汇。"uncomfortable"（不舒服的）符合语境，其他选项（不公平、热、有趣）均不相关。
2.2.
A noses
B teeth
C feet
D eyes
解析：选B。B。 前文讨论牙齿敏感问题，此处应填“牙齿”。
3.3.
A choose
B control
C doubt
D share
解析：选D。 D。“share this common problem”（共有常见问题）表示许多人面临同一困扰，符合逻辑。其他选项（选择、控制、怀疑）均不贴切。
4.4.
A eat
B buy
C cook
D steal
解析：选A。 A。后文列举“冷、热、酸、甜”食物，需搭配“吃”或“喝”。“eat”对应固体食物，与“drink”形成并列。
5.5.
A love
B fear
C breath
D memory
解析：选C。C。“a deep breath of cold air”（一口冷空气）为固定表达，指吸入冷空气刺激牙齿。其他选项（爱、恐惧、记忆）均不符。
6.6.
A expect
B cause
C require
D advise
解析：选B。 B。科学家发现原因“导致”牙齿敏感。“cause”（导致）符合因果关系，其他选项（期待、要求、建议）逻辑不通。
7.7.
A At last
B For example
C However
D Instead
解析：选B。 B。后文列举具体例子（如用力刷牙），需用“For example”（例如）引出例证。其他选项（最后、然而、相反）均不恰当。
8.8.
A touch
B catch
C hurt
D become
解析：选C。C。酸性食物“伤害”牙釉质，符合科学常识。“hurt”（伤害）直接表达负面影响，其他选项（触摸、抓住、变成）均不适用。
9.9.
A if
B before
C unless
D until
解析：选A。 A。“if your teeth are sensitive”（如果牙齿敏感）引导条件状语从句，说明缓解疼痛的前提条件。其他选项（之前、除非、直到）逻辑不符。
10.10.
A heavily
B loudly
C silently
D softly
解析：选D。D。 与“carefully”（仔细）并列，强调刷牙方式需轻柔。“softly”（轻柔地）符合保护牙齿的建议，其他选项（重地、大声地、沉默地）均不相关。