Question

Q1

_______ is the letter addressed to?
A who
B whom
C to whom
D which

Q2
They didn't invite ______ of the twins.
A none
B either
C neither
D all
​​

Answer 1

Q1 is c, A and Q2 is C

Answer 2

Q1

C. To whom

To whom is the letter addressed to?

Q2

B. either

They didn't invite either of the twins.

Hope it helps!