Помогите сделать They spent two weeks in London,__?

Помогите сделать They spent two weeks in London,__? Martin won't go to the Africa next month,__? She works hard in the lesson,__? George didn't spend the summer in the country,__? You can't repair the bike by yourself,__? Den and Tom will take part in competition,__? Mr.Brown gives a lot of homework,__?