1.It's very windy and cloudy today, isn't it?
2.They spent two weeks in London, didn't they?
3.Martin won't go to the Africa next month, will he?
4.She works hard in the lessons, doesn't she?
5.George didn't spend the summer in the country, did he?
6.You can't repair the bike by yourself, can you?
7.Den and Tom will take part in competition, won't they?
8.Mr. Brown gives a lot of homework, doesn't he?