第四部分：（共10小题，每小题1分，共10分）
根据下面句子的意思，从方框中选择适当的单词或短语填在每句空白处，请将答案写在答题纸的相应位置。
System violent scene/sight arrival slightly eastwards
surrounded exists balanced permitted/allowed
1.He was very __________ (暴躁的)when he got drunk.
2.I’ll tell him the news on his__________ (到达)。
3.The patient is __________ (稍微) better today.
4.Go__________ (向东) to the end of the street and you will find the book.
5.In some countries,people eat too much fat and sugar.They should eat a__________ （平衡的）diet to keep healthy.
6.The sunrise is a beautiful __________（景象）.
7.We are not __________（允许）to swim in the river.It’s too dangerous.
8.The professor has brought in a good __________（系统）of teaching languages from abroad.
9.Now we still don’t know whether life __________（存在）on Mars.
10.The house was__________（围绕）by high walls.
表示下述哪种曲面（）？