This young tree could not have been damaged ______accident; I believe it was done _____ purpose.
We can never expect ________bluer sky unless we create _____less polluted world
—Tom,how about going for a picnic this weekend?— ________. I love getting close to nature.
_________ after a long walk, Kate called and said she couldn't come to the party.
Written in a hurry, ________________.
The 8.8 quake in central Chile caused widespread damage, destroying lots of buildings and hundreds of thousands of people_______ .