根据句意及首字母提示补全单词

1. This story is very i__________. We all like it.

2. I think Tom will come back s__________.

3. Jack often w__________ to his pen pal.

4. China is a c__________ with a long history.

5. He speaks French well. Is he from F__________?

简述扩大农业土地经营规模的条件。