— ______does it take him to come to work by train?
| — ______does it take him to come to work by train? — An hour. |
| [ ] |
| A. How often B. How long C. How far |
可能相似的问题
| — ______does it take him to come to work by train? — An hour. |
| [ ] |
| A. How often B. How long C. How far |