Need your valuable evaluation for the below Grammer questions

1. Don't worry. I ________ the work by the time you get back.
(A) will have finished
(B) have finished
(C) will be finished
(D) would have finished

My answer : (A)

2. Although my department always submits its annual report by the end of the year, some ________ wait until the end of January.
(A) had has to
(B) has had to
(C) have had to
(D) had to have

My answer : (C)

3. New safety requirements ________ by the government.
(A) have created
(B) will create
(C) would create
(D) were created

My answer : (A)

4. Identify the wrong
My mother made me to write a thank-you letter
A B
to my grandmother for the birthday present that
C D
she gave me.

(A) me
(B) to write
(C) to
(D) that

My answer : (B)