Вопрос по английскому языку:

Укажите номер подчеркнутого фрагмента, в котором допущена ошибка.
А19. There (1) has been a steady rise in (2) the average temperature around the planet over the last hundred years or so (3) and the majority of scientists puts it down to (4) human activity.
A20. These shoes of your (1) don't go with (2) that suit at all and I actually like the ones (3) you've put aside (4).
A21. The report (1) says that five hundreds of people (2) were killed (3) in the explosion (4).
A22. I know that people are always interesting (1) in famous people's private lives (2), but I do think some of the personal questions they ask on chat shows (3) can be a bit more embarrassing for (4) guests.
A23. Your manager asked if he will be allowed (1) to advertise for (2) more staff after (3) some workmen retired (4).
A24. Some people feel there's (1) not worth to take low-paid jobs (2) if they can get unemployment benefits (3) from (4) the state.