根据句意及首字母提示完成单词。

1. We should e________ our thanks to others when they help us.

2. We have entered a p________ in world history when children are all learning English.

3. The number of Chinese s__________ is larger than that of English.

4.-What language is spoken most w________ in the world?

   -English.

5. Tom likes painting and his sister shows an i_________ in it, too.