第5题: [单项选择]"... people who die wondering. What if " ( Para. 3, Line 3 ) refers to "those ______". A. who think too much of the dark side of life B. who regret giving up their career halfway C. who think a lot without making a decision D. who are full of imagination even upon death 参考答案:B 答案解析:[解析] 本题可以依据该句出现在上下文作出判断。该句出现在第三段，上文是“But I knew I wanted to write，I had dreamed about it for years．”
第20题: [单项选择]下列情况可暂不行牙槽骨修整术的是（） A. 拔牙后2个月，下颌骨尖压痛明显 B. 上颌无牙颌牙槽突前突明显 C. 上下颌间牙槽嵴间隙过小，义齿修复时无法排牙 D. 上颌无牙颌一侧上颌结节存在倒凹 E. 义齿基托下方牙槽嵴严重突出 参考答案:D 答案解析:牙齿缺失后行义齿修复前需手术修整牙槽突上有碍于义齿就位及承受颌力的畸形，如骨尖、锐利骨嵴及倒凹等。上颌无牙颌一侧上颌结节存在倒凹不影响义齿就位。
