22. He demanded that such things_____ from happening again.

Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.

The happy look on his face suggested that he ________the final examination successfully

They _____ for sixteen hours and still have a long way to go

e the fact that it is still not fullyunderstood, more and more farmers are _________ this modern technology ofagriculture．