18. A new ___ bus service to Tianjin Airport started to operate two months ago .A.normalB.usualC.reg

题目简介

18. A new ___ bus service to Tianjin Airport started to operate two months ago .A.normalB.usualC.reg

题目详情


18. A new ___ bus service to Tianjin Airport started to operate two months ago .
A.normalB.usualC.regularD.common
题型:单选题难度:偏易来源:不详

答案

C

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