3. He was respected for his contributions to the development of the local community. He has contributed much to developing the local economy. (contribution n. _____；contribute v. _____) 4. Thomas Edison was a famous inventor. He invented more than one thousand new things for the world. (inventor n. _______；invent v. _____) 5. There are some arguments between the employer and his workers about the payment. Therefore it’s normal for them to argue with each other. (argument n. _____; argue vi. _____)

贡献

贡献

发明家

发明

争论

争论