English grammar mistakes

The small town was negatively ___ by the natural disaster.

He gave him a ___ smile.

The article is _____ to...

There was an ____ silence when they were introduced.

The other character shown in the scene is WIlliam Black, he is the ex husband of Abby Black _____ Oskar visited...

___ main goal was to...

It took us longer than we thought it would.

It was really __ being on that bus.

If someone in a developed country _____ their job, they...

... that held Britain together ___ so many decades...

I wasn't sure ____ or not to answer.

We must make a real effort to ___ greater coordination between the different groups.

She is very ____ in her approach to work.

"Oskar is an american boy." - check the grammar.