He always manages to say the wrong thing

She graciously offered to get pizza...

He denies taking her book

Do you mind driving?

They built a wall to avoid soil being washed away

She always makes me laugh

They never let the children play outside

He left without saying good bye

After winning the prize..

She helped organize/to organize the party - Некорректное тестовое задание так как после help можно употреблять последующий глагол и с to, b без to. И так, и так правильно.

She spent the summer working ON a farm

Most of the people who live IN the suburbs

It feels like he spent most of my time ... school (Похоже на то, что он провел большую часть моего времени -  школе - Бред получается, напишите какие там хотя бы варианты есть с чего выбирать, похоже на то что в предложении ошибка)

It's impossible to park IN the city center

There is very little DIFFERENCE between

His QUIETNESS worried her

Regular physical ACTIVITY

I couldn't make OUT

I told the kids story, making it UP

Thieved broke into the school and made OFF WITH  

нужны варианты но думаю что OF

Her enthusiasm makes UP FOR