Question

I wrote - - - my father a letter - - - last week.​

Answer 1

Answer:

I wrote a letter to my father last week

Explanation:

rearranged sentence

Answer 2

Answer:

The, correct answer are to, in.

Explanation:

The complete sentence will look like-

I wrote to my father a letter in last week.

In this statement, the speaker is telling that

he wrote a letter to his father in the last

week.

This makes correct grammatical sense and

justifies the use of prepositions.

So, to, in are the appropriate answers.