Although he knew little about the large amount of work done in the field , he succeeded ____other more well-informed experimenters failed.
. He will have learned English for eight years by the time he_____from the university next year.
. —Have you known each other for long? —Not very long, ________we started to work in the company.
. -I didn't do well in physics. -I did you; so we are half and half.
. All the others seem to know each other and I began to feel ________.
. They climbed to the top of the tower, ________they could see what was happening in the distance.