I shall certainly not tell him the news. ________, it will go to his ears sooner or later. 

 Just as a book is often judged ______ by the quality and appearance of its cover, a person is judged immediately by his appearance.

She devoted herself _______ to her research and it earned her a good reputation in her field. 

I cannot thank you ______ much of your kindness. I owe my success to you.

One should remain ______ and think of ways to escape when facing danger.