38. The best title for this passage would be ________
A) Settlements Spread Westward
B) The Coast-to-Coast Railroad: A Vital Link
C) American Railroad History
D) The Importance of Railroads in the American Economy
注：本文主題詞：transcontinent railroad，A選項直接摘抄，C選項範圍過大，D選項railroads範圍過大
●文章標題題型：1.文章主題詞必須在選項中出現
2.選項範圍恰如其分，不可過大，亦不可過於細節
範圍過大：選項本身範圍過大;選項缺少文章中的限定詞
範圍過細：只出現某一段中心事物的選項
3.直接從文章首句或某句話摘抄詞語編成的選項為干擾
Questions 51 to 55 are based on the following passage:
51. In the first paragraph, the writer tells us that
statuses can help us _________.
A) determine whether a person is fit for a certain job
B) behave appropriately in relation to other people
C) protect ourselves in unfamiliar situations
D) make friends with other people
注：status 身份地位
