D.nature is a source of joy forever
37[单选题] The research of the US university found that most people feel happy when they ___________. 查看材料
A.are after their goals
B.work as gardeners
C.are at leisure
D.have great leisure
38[单选题] The author mentions a man indulging in dreams of numerous lovers in order to ___________. 查看材料
A.show the serious problem in marriage in modem society
B.illustrate an extreme way to achieve happiness
C.criticize those who do not cherish what they already have
D.indicate that happiness involves something besides the desire to gain
39[单选题] Who is more likely to be unhappy according to the study? 查看材料
A.The man who is ambitious regardless of his actual situation.
B.The one who has self-esteem and has confidence in himself.
C.The one who can take pleasure in communicating with others.
D.The one who always helps others and also accepts help from others.
40[单选题] From the passage we know that happiness is ___________. 查看材料
A.a transitory state of mind
B.getting everything what one is eagerfor
C.a desire based on our actual situation
D.an all-working and no-leisure life
39参考答案：A 参考解析：根据文章最后一段“A happy man is one who aims high but never forgets his actual situation”可以推断出答案为A。