question: this marriage caused problems for sofia and, throughout its fifteen years, it was a source of intermittent sorrow, exasperation and tension and her concentration was broken by her frequent quarrels and misunderstandings with her husband .
Capitalize this past sentence correctly.
A: This marriage caused problems for Sofia and, throughout its fifteen years, it was a source of intermittent sorrow, exasperation and tension and her concentration was broken by her frequent quarrels and misunderstandings with her husband .

question: let's look at each one of these solutions.
Capitalize this past sentence correctly.
A: Let's look at each one of these solutions.

question: when the 25.-26. june opens the doors to our 8.
Capitalize this past sentence correctly.
A: When the 25.-26. June opens the doors to our 8.