Only in this way_______progress in your subjects.
15. Three quarters of the land here _____ wet land, an ideal place for migrating birds.
14. After a _____ walk, she couldn’t move forwards any more.
13. The British Isles are a group of islands that lie_____ the west coast of Europe, and the island just Britain is called Ireland.
12. Most American cities are relatively small _____ population when compared with Shanghai and Beijing.
10. ----What’s that noise? ----Oh, I forgot to tell you. The new machine _____.