31. What is the purpose of this passage?
(A) To argue about a policy
(B) To ask for protection
(C) To explain the structure of the American government
(D) To promote an app
(E) To tell a story about oil drilling
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統計: A(32), B(2), C(2), D(0), E(0) #3233427
統計: A(32), B(2), C(2), D(0), E(0) #3233427