Задание 1.
1. aren’t you?
2. has he? (здесь может быть ошибка)
3. did he?
4. can they?
5. does she?
задание 2.
1. himself
2. themselves
3. ourselves
задание 3.
1. who
2. which
3. where
задание 4.
1. had fallen, called
2. had had, stopped
3. had checked, went