163.It is the great happiness on earth-----.A.loving and to be lovedB.to love and being lovedC.to love and to be lovedD.love and be loved
问题描述：
163.It is the great 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
选C,to love and to be loved为并列的不定式结构,在句中作真正的主语,it为形式主语,虽然动名词也可用作主语,但and连接的并列结构的语法形式应一致,故A、B有误；而D不定式符号to不可省去,如：
To see is to believe.＝Seeing is believing.“眼见为实”
本题可译为“爱别人与被别人爱是人世间最大的幸福.”