Mr Green had got a problem.He worried _____ his son's lesson

Mr Green had got a problem.He worried _____ his son's lessons.He came to the headmaster's office.The headmaster was _____.He didn't think that Jim _____ in trouble because he thought Jim was doing _____ in all his lessons,that he was a hard-working boy and believed that Jim would _____ well in the exams.Mr Green _____ the headmaster Jim was going back to England for a holiday.He worried that his son _____ a lot of lessons.He could help Jim with most of his subjects _____ Chinese.The headmaster thought Jim learned by _____.Mr Green wanted to ask Jim's Chinese teacher to give Jim something to do during the holiday.The headmaster agreed to this idea.Mr Green was glad ____that.