题文
A new _____ bus service to Tianjin Airport started to operate two months ago.
| A．normal |
| B．usual |
| C．regular |
| D．common |
推荐试卷
A new _____ bus service to Tianjin Airport started to operate two months ago.
| A．normal |
| B．usual |
| C．regular |
| D．common |
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