I wish to thank Professor Smith, without _______help I would never have got this far.

I wish to thank Professor Smith, without _______help I would never have got this far.

A．who             B．whom            C．whose            D．which

I wish to thank Professor Smith, without _______help I would never have got this far.

I wish to thank Professor Smith, without _______help I would never have got this far.

1. A.
   who
2. B.
   whose
3. C.
   whom
4. D.
   which