世界上最早的进行死骨剔除术和剖腹术的外科学家是（）。
A.扁鹊
B.郑玄
C.华佗
D.医竘
E.张仲景
参考答案：C
根据汉语提示完成句子.
1. 我的婶婶上周末为我做了一个蛋糕.
My aunt _____ a cake _____ me last weekend.
2. 约翰上周去图书馆,读了一本关于历史的书.
John went to the ____ and read a book about _____ last week.
3. 你认为每个人周末都过得快乐吗?
Do you think everyone _____ their weekends?
4. 她该去上学了.
It's time for her _____ _____ to school.
5. 我的父亲晚饭后经常去散步.
My father often _____ _____ _____ after dinner.
环境威胁分析法
