问题
选择题
| — How long has the man been waiting? — He _____ for 20 minutes. |
A. has been waiting B. is waiting C. was waiting D. will wait |
答案
答案：A
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| — How long has the man been waiting? — He _____ for 20 minutes. |
A. has been waiting B. is waiting C. was waiting D. will wait |
答案：A