1. The three things most difficult are, to keep a secret, to forget an injury, and to make good use of labour. 

2. He can't keep a secret.

3. Can you keep a secret?

4. Can I trust you to keep a secret?

5. Tom was utterly indiscreet, and could never keep a secret.

6. William Right-so-can you all keep a secret?

7. The man who can keep a secret may be wise, but he is not half as wise as the man with no secrets to keep. Edgar Watson Howe 

8. The City's ability to keep a secret appears to have improved beyond measure over the past two years.

9. Three may keep a secret, if two of them are dead. Benjamin Franklin 

10. If you want to keep a secret, you must also hide it from yourself. George Orwell 

11. You can't keep a secret - you see no reason why you shouldn't spill the beans.

12. Why did you have to go and tell Bob about my illness? You just can't keep a secret, can you?

13. Trust her to spill the beans, she never could keep a secret.

14. It put me in an awkward position when he asked me to keep a secret.

15. I'm telling you because I figure you're the only one who can keep a secret.

16. Acknowledging the ephemeral nature of security, Franklin cheekily said, "Three can keep a secret,[sentence dictionary] if two of them are dead."

1. He can't keep a secret.

2. Why did you have to go and tell Bob about my illness? You just can't keep a secret, can you?

3. Trust her to spill the beans, she never could keep a secret.