It is he frequently returns home late makes his parents concerned about him.
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.
The familiar English song ______ me of the happy days l spent in Scotland several years ago.