What goes around comes around.

There's someone I'm in (unrequited) love with, but that person is busy now and I don't get replies to my emails.

Her cheerful voice responded just like that. Guess I was worrying over nothing...

Sharapova's shots are very fast but...a fast ball means that it will come back that much faster.

I explained the situation, as this, that and such and such, but they just nodded along without showing much interest.

It may seem like a hassle, but I think you ought to go back to the basics and start over. Haste makes waste they say.

I looked over my shoulder.

They hurried by without a glance.

He looked back and smiled at me.

He took her cubs, and ran up the mountain without looking back.

He told me not to look behind.

He looked back at the pretty girl.

She's quick on her feet, so no matter what you say to her, she'll have a witty comeback.

Looking back on our college days, it seems as if they were a century ago.

Has the wash come back yet?

When I look back on my life, I realize how much time I wasted.

I think everyone looks back on their childhood with some regret.

The new Diet member was smoking, leaning back proudly in a chair.

In looking back, I feel deeply grateful to my parents.

There was something about that house that made her stop and look again.