Jack, _____ you behave yourself? You’re no longer a kid．—Sorry, Daddy．It won’t happen again．

The rise in wood fuel(燃料) use has __________ the disappearance of forest and the loss of habitats for pandas..

The flowers will die soon unless often ________.

will your aunt go to Australia一To see her daughter there.

Tom has won the 100-meter race—__________!He never won it before