题目内容：
You ________ engage in serious debate or discussion unless you are willing to endure attacks.
A．have better not B．had better not
C．have better not to
D．had better not to
参考答案：
答案解析：
单选题：You ________ engage in serious debate or discussion unless y
- 题目分类：英语运用能力测试
- 题目类型：单选题
- 查看权限：VIP
B．had better not
C．have better not to
D．had better not to