She had a tense expression on her face, ______she were expecting trouble.
Cheer up! It won’t be ______ we can meet again.
They stood there and ______ each other as if they were going to fight.
The president did much for world peace. That was ______ he was awarded the Nobel Peace Prize.
―Are you disappointed with the result of the experiment?―No. ______, I’m pleased with it.
―Did you listen to Barbara’s speech?―Yes, I have never heard a ______ one.