问题补充:
单选题Thebridgeissoimportanttothepeopleherethatonce________itmustbecarriedoutwithoutdelay.A.designsB.having designedC.designingD.designed
答案:
D解析这里用过去分词,相当于一个状语从句,完整的句子是: once if it is designed.
如果觉得《单选题The bridge is so imp》对你有帮助,请点赞、收藏,并留下你的观点哦!