He must send the letter.(Change into passive)
AA letter must be sent by him.
BThe letter must sent by him.
CA letter must been send by him.
DThe letter must be sent by him.
AA letter must be sent by him.
BThe letter must sent by him.
CA letter must been send by him.
DThe letter must be sent by him.
Related Questions:
Change into Passive Form:-
Your behaviour vexes me .
The passive form of .
We are to buy a new home .