请教一道英语选择题紧急谢谢It is the greatest happiness on earth _________
请教一道英语选择题紧急谢谢
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
请问不定式表示什么?能不能用loving and being/been(我不知道是哪一个)loved?谢谢