While working on the farm, the students ________ a good knowledge of plant life
Sam has been appointed_____ manager of the engineering department to take _____ place of George.
.一You really appreciate John Lenon’s performances, don’t you? 一______ I just like his soft voice.
—Did you give your father _______? —Yes ,I advise he _______smoke .
Every possible means ___________but no one knows which is suitable .
—Is that the small town you often refer to ? — Right , just the one _______you know I used to work for years.