题目内容：
9(5.0分)
5.0
Advertising is often the most _______ method of promotion.
A)
efficient
B)
efficiency
C)
effect
D)
effective.
参考答案：
选择题：9(5.0分)
- 题目分类：华北水利水电大学-工程测量技术-大学英语（2）
- 题目类型：选择题
- 查看权限：VIP
9(5.0分)
5.0
Advertising is often the most _______ method of promotion.
A)
efficient
B)
efficiency
C)
effect
D)
effective.