19. Most animals are s______ to large and sudden changes in temperature.

18.　　 The people struggled to create a new South where f_____ slaves and slave-owners could live together.

17.　　 They have ______(完成，实现) their mission successfully.

16.　　 But the smaller blue stone, still weighing four tons on a______.

15.　　 We burned with ______(好奇心)over what was in the box.

14.　　 A______ to the law, Shylock may have a pound of flesh to be cut off nearest to Antonio’s heart.

13.　　 The cause is ______(值得) of our continued support.

12.　　 They are the result of a long p______ of trial and error.

11.　　 We all have our little ______(弱点，小毛病).

10. Today there are more opportunities for disabled people to develop their potential, live a rich life and make a c______ to society.