He didn't selfishly keep for himself the money inherited from his uncle. Instead, he made a __________ contribution to help the community.
—You should have given me a ring before you left. —I meant______, but I was in a hurry that time.
Some researchers believe that there is no doubt ______a cure for AIDS will be found.
He was about to tell me the secret ______ someone patted him on the shoulder.
______ you’re tried it, you can’t imagine how pleasant it is.
For miles around me there was nothing but a desert, without a single plant or tree ______.