I was out of town at the time, so I don’t know exactly how it ____.[ ]

I’ve decided to go to London next weekend. I was wondering ___ you could go with me.

Perhaps loneliness is one of the biggest problems in our society these days.— It especially appears among teenagers.

The data shows ________ successful peoplehave in common is ________ they have perseverance

It was quite a serious mistake, ____caused by carelessness.