Many scientists believe that the universe began with an enormous explosion called the “Big Bang”, ______ happened about 13.7 billion years ago.
Yesterday, Jane walked away from the discussion. Otherwise, she ______something she would regret later.
His health is ______improving. I'm sure he will come back to work soon.
My first _______ of him was that he was a kind and thoughtful young man.
As he _______ , he was surprised to see that the man had disappeared.
Studies show that sunshine, fresh air, and plenty of rest often _______ a person’s recovery from sickness.