人乳突由鼓窦向乳突部逐渐发展，多开始于（）
A.胚胎期
B.初生时
C.2岁后
D.6岁左右
E.青春期
参考答案：C
My daughter went to see her grandma by bus, but I _____ her there. [ ]
A. must have driven
B. should have driven
C. could have driven
D. might have driven
巩膜最薄处位于（）
A.与角膜连接处
B.眼外肌附着处
C.后板部
D.赤道部
E.与视神经连接处
