题目内容：
Sheep are important tamed animals because they provide food and clothing;（ ）, they are used in making other products such as so, and glue.选项
A:should have stayed
B:had stayed
C:was to stay
D:must stay
参考答案：
选择题：Sheep are important tamed animals because they pro
- 题目分类：综合英语
- 题目类型：选择题
- 查看权限：VIP
选项
A:should have stayed
B:had stayed
C:was to stay
D:must stay