问题描述：
| A new ____ bus service to Beijing Airport started to operate yesterday. |
| [ ] |
| A. normal B. usual C. regular D. common |
考点提示：形容词
最佳答案： | C |
A new ____ bus service to Beijing Airport started to operate yesterday. [ ]A. normal B. usualC. regu
A new ____ bus service to Beijing Airport started to operate yesterday. [ ]A. normal B. usualC. regu
最佳答案： 