Ответ:
1 They must have got our money.
2 She might will arrive this afternoon.
She could will arrive this afternoon.
3 They can't be brother and sister.
4 He might be Spanish or Italian.
He could be Spanish or Italian.
5 He can't be the new manager.
6 She must be in the office.
7 The bag might belongs to Helen.
The bag could belongs to Helen.
8 It must be his fault.
Объяснение: