The concert by Lang Lang was so well ______ that all the tickets had been sold out on the first three days last month.

You should thank Peter. It was he who finally ____ your son to stop smoking and playing computer games.

When the question _____ at the meeting, no one could answer it.

—Ann is in hospital.—Oh，really？I ________ know.I ________ go and visit her.

After the trainer was sure that the whale could look after itself, he _______ it into the sea.