问题
选择题
| — I wonder how much you charge for your services. — The first two are free _____ the third costs $30. |
A. while B. until C. when D. before |
答案
答案：A
搜题请搜索小程序“爱下问搜题”
| — I wonder how much you charge for your services. — The first two are free _____ the third costs $30. |
A. while B. until C. when D. before |
答案：A