As I’ll be away for at least a year, I’d appreciate _______ from you now and then telling me how everyone is getting along.

   A. hearing         B. to hear

   C. to be hearing     D. having heard

As I'll be away for at least a year, I'd appreciate ________ from you now and then telling me how everyone is getting along．

1. A.
   hearing
2. B.
   to hear
3. C.
   to be hearing
4. D.
   having heard

As I'll be away for at least a year, I'd appreciate ____ from you now and thentelling me how everyone is getting along.

A hearing　 B. to hear　 C. to be hearing　 D. having heard

As I’ll be away for at least a year, I’d appreciate ____ from you now and then telling me how everyone is getting along. 
A hearing     B. to hear     C. to be hearing     D. having heard