题目内容：
20. Clerk: Good morning. Can I help you?Mr. Smith: Yes, I’d like a ticket to New York 9:15 tomorrow morning.
Clerk: _______?
Mr. Smith: Single, please
(3分)
A. Single or return
B. Single or double
C. Single or two
D. Single or back
参考答案：
选择题：20. Clerk: Good morning. Can I help you?Mr. Smith:
- 题目分类：西北大学大学英语（上）
- 题目类型：选择题
- 查看权限：VIP
Mr. Smith: Yes, I’d like a ticket to New York 9:15 tomorrow morning.
Clerk: _______?
Mr. Smith: Single, please
(3分)
A. Single or return
B. Single or double
C. Single or two
D. Single or back