[b] vòng con gấu nì:
- she....... her holiday in finland -> told me about
- i believe ....... this town needs is a really super disco -> what
- ...... been for the attendance of a film star, the party couldn't have been success -> had it not
- up to now, they have not made a .... yet -> decision

Vòng loại chữ cái, thôi thì cái ni dễ nên chưa mò, hờ hờ