单项选择题
A.need B.needed C.want D.has
A.途经口岸;签证地点;产地 B.产地;签证地点;途经口岸 C.签证地点;产地;途经口岸 D.产地;途经口岸;签证地点
A.purity;thickness;stain B.stain;purity;thickness C.purity;stain;thickness D.thickness;stain;purity