Question

помогите с английским , пожалуйста
вставьте пропуски, 3 варианта ответа 
_______________________________

 In 1977 John announced that he had decided to stop _________Taupin began working with others
1 perform
2 performing
3 to perform
1997 John lost two close friends__2__ world famous Italian designer Gianni versace and Diana, __2___Princess of Wales
1))1 the       2)) 1 - 
2 -               2- the
3 a               3 a
His concerts in her memory and his song Candle in the Wind raised millions of pounds that went to___ Diana Memorial Fund
1- the
2- a
3- -
He  performed with_____  London Symphony Orchestra and with many world famous musicians.
1- the
2- a
3- -
His performances in ____Palace Square in St Petersburg and at ___State Kremlin Palace in Moscow were very successful.
1- the
2- a
3- -
Some people think that our work____  a success 
1- isn't going to be
2- isn't
3- won't be 

Answer 1

 In 1977 John announced that he had decided to stop performing_Taupin began working with others    2
1997 John lost two close friends__the_ world famous Italian designer Gianni versace and Diana, Princess of Wales
His concerts in her memory and his song Candle in the Wind raised millions of pounds that went to the Diana Memorial Fund
He  performed with the London Symphony Orchestra and with many world famous musicians.
His performances in  the Palace Square in St Petersburg and at the State Kremlin Palace in Moscow were very successful.
Some people think that our work____  a success.
все три варианта приемлемы
1- isn't going to be
2- isn't
3- won't be