HELP PLEASE


20. Melanie ________ robins and cardinals during her hike. * A. seened B. saw C. sawed D. seen

21. While Steven is finishing his math problems, Becky _______ on her science project * A. is working B. has worked C. was working D. worked

22. Before we landed in Ohio, we already ___________ over two of the Great Lakes. * A. will be flying B. had flew C. had flown D. will have flown