题目内容
____ the workers’ working conditions, the boss will allow them to have a coffee break.
| A.Improving | B.To improve | C.Having improved | D.Improved |
B
解析
练习册系列答案
相关题目
题目内容
____ the workers’ working conditions, the boss will allow them to have a coffee break.
| A.Improving | B.To improve | C.Having improved | D.Improved |
B
解析