阿摩線上測驗
17. Gasoline-powered vehicles had been around for more than a quarter-century by the start of the 1920, but not until that decade did they become a central factor in the everyday lives of ordinary Americans.
(A) Gasoline-powered
(B)had been around
(C)more than a quarter-century
(D) the 1920
(E)did they become
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統計： A(1), B(1), C(2), D(8), E(1) #3847853
統計： A(1), B(1), C(2), D(8), E(1) #3847853
