把握历史阶段特征有助于学好历史。下表反映了中国近代史四个不同时期阶段特征的主题词，其中1921～1935年处应该填写

C．国共对峙，走向抗战                     D．星星之火，力挽狂澜

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).