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.