问题
选择题
A new __________ bus service to Tianjin Airport started to operate two months ago.
A．normal
B．usual
C．regular
D．common
答案
C
根据常识，公交车通常是往返于某一固定的线路，故选regular最合适。
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A new __________ bus service to Tianjin Airport started to operate two months ago.
A．normal
B．usual
C．regular
D．common
C
根据常识，公交车通常是往返于某一固定的线路，故选regular最合适。