Mrs. Brown was much disappointed to see the washing machine she had _____ went wrong again.
Electricity ,like other forms of_________ ,has greatly increased in price.
In the good care of the nurses, the boy is _________ recovering from his disease.
Ladies and gentlemen, please fasten your seat belts. The plane ________.
The chairman thought ________ necessary to invite Professor Smith to speak at the meeting.
As______ matter of fact, _______beauty of nature there made a deep impression on me.