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

游客2025-02-09 8

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

选项 A、a determined effort was made
B、made a determined effort
C、when a determined effort was made
D、was a determined effort made

答案 D

解析

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NotuntiltheFirstWorldWar______toimprovetheroadsystemintheUnitedSt