2 I'm staying with my aunt while my parents are away.
3 We don't believe in ghosts.
4 My sister is into sport. She plays tennis every Saturday.
5 Mia is bad-tempered. She always shouts.
возможен вариант Mia is bad-tempered. She's always shouting, если это раздражающее действие!
6 Your car is very old. You need a new one.