问题
选择题
| I _____ along the street when I suddenly heard footsteps behind me. |
A. am walking B. had walked C. had been walking D. was walking |
答案
答案：D
搜题请搜索小程序“爱下问搜题”
| I _____ along the street when I suddenly heard footsteps behind me. |
A. am walking B. had walked C. had been walking D. was walking |
答案：D
