Sentence examples for difficult to keep from inspiring English sources

"It's difficult to keep veteran backups.

It's difficult to keep them straight.

It's difficult to keep calm.

It's very difficult to keep going".

Sometimes it's so difficult to keep up.

It was difficult to keep moving people and hiding people.

These cows become difficult to keep sound and productive.

Why is it so difficult to keep a secret?

"It would be difficult to keep that under wraps".

PROMISES are easy to make, but difficult to keep.

"But this will be difficult to keep alive.