7. In writing, you take a position on an issue and try to make the reader believe that your position is correct. (A) persuasive (B) descriptive (C) biographical (D) impromptu

15. The roots of rock and roll are actually very ; it is a style of music that developed from rhythm and blues, gospel, jazz, and American country music. (A) abstract (B) diverse (C) fragile (D) wishful II、文法挑錯：第 16-25 題，每題均有四個劃底線的選項，分別用(A)、(B)、 (C)、(D)加以標示，其中有一個是錯誤的，請選出錯誤的選項。