China has 34 high-speed rail lines,____ one-tenth of the countrys total railway operation mileage.%Dª.making upB.ha

分类: 作业答案 • 2021-12-29 16:10:51

问题描述：

China has 34 high-speed rail lines,____ one-tenth of the countrys total railway operation mileage.%Dª.making upB.having made upC.make upD.to make up

答

我觉得选A,动名词短句作伴随状语.