单词拼写。 1. Collecting stamps is one of my __________ (爱好). 2. It's not __________ (礼貌的) to talk with your mouth full. 3. I think the telephone was __________(发明) in 1876. 4. China is getting richer and stronger in the new __________ (世纪). 5. We'll be able to finish the project _________ (容易的).