2. (单选题) The three ______ working telephone lines are quite busy following the earthquake.(本题2.0分) A. remaining B. remained C. having remained D. remains

2. (单选题) The three ______ working telephone lines are quite busy following the earthquake.(本题2.0分)
A. remaining
B. remained
C. having remained
D. remains

出自：广西培贤国际职业学院-大学英语1

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