---How long have you been here?
---Only about three minutes. Xiaoming and Mary _____here with me.[ ]
A. walk
B. have walked
C. had walked
D. walked
答案:D
---How long have you been here?
---Only about three minutes. Xiaoming and Mary _____here with me.[ ]
A. walk
B. have walked
C. had walked
D. walked
答案:D