题目内容：
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.选择一项：
A.
have to
B.
dared
C.
may
参考答案：
选择题：A campus emergency ______ occur at any time of the
- 题目分类：国家开放大学管理英语3
- 题目类型：选择题
- 查看权限：VIP
选择一项：
A.
have to
B.
dared
C.
may