根据所给词的适当形式填空。
1. Did you enjoy the movie about ______ (live) on the Mars (火星).
2. David Smith with his brother______ (hang) out their best friends during the vocation.
3. We ______ (visit) the Summer Palace last Summer holiday.
4. Can you see a boy ______ (lie) on the ground?
5. —When ______ she ______ (join) the national football team? —5 years ago.
6. He ______ (become) a professional soccer star when he was twenty-two.
7. He ______ (visit) China when he was fourteen years old.
8. The little boy could sing some difficult and beautiful ______ (piece) of music.
9. How long did you spend ______ (finish) ______ (write) this novel?
10. There ______ (be) a class meeting next Monday.
