Помогите пожалуйста не могу сделать только 9 номер

1 Jack has been doing chemistry since 2009. 2 We have been preparin Christmas decorations all the morning. 3 Fiona has been working on the computer since the beginning of the school year. 4 We have been playing football for half an hour. 5 The Wilsons have been traveling Australia for about two months.