Câu 1 They were in Rio last summer. Dịch Họ đã ở Rio vào mùa hè năm ngoái. (-)They weren't in Rio last summer. (?) Were they in Rio last summer? Câu 2 She was my boss Dịch cô ấy là sếp của tôi (-) she wasn't my boss (?)Was she my boss? Câu 3 I wasn't at the concer last Sunday Dịch Tôi đã không ở buổi hòa nhạc vào Chủ nhật tuần trước (+) I was at the concer last Sunday. (?) Was You at the concer last Sunday ? Câu 4 The hotel was very expensive Dịch Khách sạn rất đắt (-) The hotel wasn't very expensive . (?) Was the hotel very expensive? Câu 5 were they born in Korea ? Dịch họ được sinh ra ở Hàn Quốc đúng ko ? (+) They were born in Korea . (-) They weren't born in Korea Câu 6 She was tired last night . Dịch Cô ấy đã mệt vào đêm qua. (-) She wasn't tired last night . (?) Was she tired last night? Câu 7 they weren't at Nina 's house yesterday Dịch họ đã không ở nhà của Nina ngày hôm qua (+) They were at Nina 's house yesterday. (?)Were they at Nina's house yesterday?