17. Where in the passage does the author describe why the appearance of beads may change? (A) Lines 3-4 (B) Lines 6-8 (C) Lines 12-13 (D) Lines 20-22.

19. Which of the following statements best represents the type of "evolutionary fine - turning" mentioned in line1? (A) Different shapes of bills have evolved depending on the available food supply (B) White - wing crossbills have evolved from red crossbills (C) Newfoundland's conifers have evolved small cones (D) Several subspecies of crossbills have evolved from two species

17. Where in the passage does the author describe why the appearance of beads may change? (A) Lines 3-4 (B) Lines 6-8 (C) Lines 12-13 (D) Lines 20-22.

其他試題

17. Where in the passage does the author describe why the appearance of beads may change?
(A) Lines 3-4
(B) Lines 6-8
(C) Lines 12-13
(D) Lines 20-22.