Not until the First World War ______ to improve the road system in the United States.A.a d

外语类 公共英语 已帮助 人

Not until the First World War ______ to improve the road system in the United States.

A.a determined effort was made

B.made a determined effort

C.when a determined effort was made

D.was a determined effort made

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热搜:关于氨基酸代谢错误的论述是_________。