1. Edison had over two thousand               (invent) in his life.
2. English               (teach) in our school by Mr Green last term.
3. Perhaps my               (excite) can affect her moods.
4. May I               (introduction) myself to you?
5. I'm learning English, but I still can't speak it               (proper).
6. Fei Junlong and Nie Haisheng are our space               (hero) in China.
7. The               (develop) of China is very quick.
8. I think that watching TV for a long time is               (harm).
9. The old car               (produce) in Germany in the 1980s.
10. There's no               (different) in the results.