Выполните следующие предложения, используя past perfect 1) Doris explained that he ( not to understand) rule number. 2)Angela wanted to know if they( to be) there before . 3)Olaf asked if we (to buy ) tickets for the new play. 4) mother wondered if James ( to pay) for the tickets to Paris . 5) Aunt Grace said she ( to visit ) the Bahrushin Theatre Museum in Moscow . 6) She added that she ( to spend ) three hours there 7) Andrew told his brother he ( to choose ) a birthday present for their mother. Помогите пожалуйста!!!!! очень срочно!!!!!!!!

1) Doris explained that he hadnt understood rule number.
2) Angela wanted to know if they had been there before . 
3) Olaf asked if we had bought tickets for the new play.
4) Mother wondered if James had paid for the tickets to Paris .
5) Aunt Grace said she had visited the Bahrushin Theatre Museum in Moscow . 
6) She added that she had spent three hours there
7) Andrew told his brother he had chosen a birthday present for their mother.