He _________ the boy's ignorance and sold him a worthless learning machine.
Three minutes earlier,they could have escaped such a disaster.
______ on this report the English government decided to ask Captain Cook to go and look for this continent.
Those who show respect for others will be respected ________.
Darwin counted 225 flowering plants, ______ he collected and brought home 193.
He came to my class every week, but his attitude _______he was not really interested in the subject.