问题
选择题
It is the greatest happiness on earth______. [ ]
A. to love and to be loved
B. to love and being loved
C. love and to be loved
D. loving and to be loved
答案
A
It is the greatest happiness on earth______. [ ]
A. to love and to be loved
B. to love and being loved
C. love and to be loved
D. loving and to be loved
A