It’s very kind__________you to help me with my English．

         一Not at a11．I think it is important____________us to help each other．

           A．of，of        B．for，of       C．of，for       D．for，for

It’s very kind__________you to help me with my English．一Not at a11．I think it is important____________us to help each other．

1. A.
   of，of
2. B.
   for，of
3. C.
   of，for
4. D.
   for，for