About Passage 1 Question 18，which choice should be selected？
A. Human contact is not important in life.
B. Involving yourself is stressful.
C. Some people feel that they have lost hope to move forward.
D. People want to be left alone to live their lives happily.
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About Passage 2 Question 19，which choice should be selected？
A. Help you relieve tension.
B. Help you make friends.
C. Help you form new skills.
D. All of the above.
About Passage 2 Question 20，which choice should be selected？
A. Common interests.
B. Friendship.
C. Happiness.
D. Stress.
About Passage 2 Question 21，which choice should be selected？
A. Provide you with a sense of purpose.
B. Give you professional progress.
C. Make you happy helping others.
D. Strengthen relationships.
About Passage 3 Question 22，which choice should be selected？
A. The sources.
B. The cancer.
C. Diseases.
D. The diagnosis.
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