题目内容：
请在第______填上正确答案.
A．Everyone experiences this emotion. B．Is it possible to develop a sense of humor?
C．He advises us to lose our inhibitions (抑制 ) and try to laugh at ourselves.
D．However, that does not mean that infants have a sense of humor.
E．What is true, however, is that we are born with the capacity to laugh and smile.
F．He had a serious purpose, but if you have s sense of humor, you will probably find the sign funny !
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