The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.
Will these vegetables _____ for four to five days in the fridge?
The audiences’ reaction made it _____ that this play was a great success.
E-mail, as well as telephones, an important part in daily communication.
After staying in hospital for long, the patient was advised to go to the seaside to__ his health.
______ all day, he was terribly hungry.