What will he do ? what do you think?

Ithink he will take part in this comprtition.  - я думаю, что он примет участие в этом соревновании.

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.