题目内容：
______ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.A. To wait
B. Have waited
C. Having waited
D. To have waited
参考答案：
选择题：______ in the queue for half an hour, Tom suddenly
- 题目分类：兰州财经大学大学英语
- 题目类型：选择题
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A. To wait
B. Have waited
C. Having waited
D. To have waited