If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.
–Mum, I failed again in today’s examination. --Oh, ________. The world is not _______.
_____surprised me most was _____such a little boy of seven could play the violin so well.
Bobby ______ me your secret, but he meant no harm.
We must do whatever we can to____________the river being polluted any more.
. His success was because of ________ he had been working hard.