问题
选择题
It is the greatest happiness on earth ______.
A．loving and to be loved
B．to love and being loved
C．to love and to be loved
D．love and be loved
答案
答案：C
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It is the greatest happiness on earth ______.
A．loving and to be loved
B．to love and being loved
C．to love and to be loved
D．love and be loved
答案：C