Question

Before he posted the letter, he
(write) it very carefully. (use
the correct tense)​

Answer 1

Answer:

wrote

Explanation:

see in this question there are ask you that use the correct tense so before he posted the letter the verb posted have ed so, it is in past tense so wrote is answer

Answer 2

Answer:

The correct sentence will be :

Before he posted the letter, he wrote it very carefully.