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(A) Along
(B) Down
(C) Toward
(D) Up

(A) Along with 隨著

（1）the arriving generation：第一代移民英語很破，學得不好

（2）the first children born in America：第二代移民變成雙語模式，英語為主

（3）their children：第三代移民，母語都忘光光了

隨著世代演進，英語越來越好，母語逐漸失落

For most of its history, America was precisely正是 the “polyglot多語言的 boarding house寄宿公寓” Teddy Roosevelt once worried it would become.

That history has turned out very well not just for America, but for English—the most successful language in the history of the world.
這段歷史不僅對美國來說非常好，對英語——世界歷史上最成功的語言也是如此。

Along with American power, English has spread around the globe.
隨著美國的強大，英語在全球傳播開來