Then mills have redecorated their room

What i don't understand

He said that he had written compositions twice a week. he said that he was writing an essay. he said that he had been writing compositions since the fifth grade. he said that he had written two compositions this week. he said that he had never written such complex (difficult)   compositions.

2)mary works in paris.she is having a meeting in rome.

3)natalie runs  regularty. she is training for the olimpics

4)peter delivers letters. he is having lunch