13.When we complete each step of our goals, ________.

21.

20.I fell and hurt myself while I ________ basketball yesterday.

19.The higher the temperature, _____the liquid evaporates.

18.The workers are busy ____models for the exhibition.

17.He _______ lives in the house where he was born.

16.All ______ they have done is good for us all. We should understand them.

15.Which of the following statements is wrong according to the passage? _______

14.What is the main idea of this passage? _______

13.When we complete each step of our goals, ________.

12.New short-term goals are built upon______.