It's obvious that the experiment ______ a great success.
While watching Titanic, I was deeply impressed by the scene____Jack saves the life of the girl but dies in icy water himself.
. After hearing the terrifying story, Polly hid behind the door, _______ with fear.
Sometimes the result itself is not important; it is the efforts you have made to achieve it that ______.
It is the prevention of disease ______its successful treatment that has led to the rapid increase of the world’s population.
Because every day we have _______mail to receive ,we may not be able to reply to your letter.