Complete the questions with tag endings.she works hard in the didn't spend the summer in the can't repair the bike by yourself( and tom will take part in mr brown gives a lot of

She works hard in the lessons, doesn't she?
George didn't spend the summer in the country, did he?
You can't repair the bike by yourself(сам), can you?
Den and Tom will take part in competition, won't they?
Mr Brown gives a lot of homework, doesn't he?