Giúp em làm bài này vs ạ Câu 1: Hoa / receive/ letter/ her friend Nien/ today. A. Hoa receives a letter from her friend Nien today. B. Hoa received a letter from her friend Nien today. C. Hoa has received two letters from her friend Nien today. Câu 2: Nien/ be/ Hoa’s/ next-door neighbor/ Hue. A. Nien was Hoa's next-door neighbor in Hue. B. Nien is Hoa's next-door neighbor in Hue. C. Nien is being Hoa's next-door neighbor on Hue. Câu 3: Nien/ be / twelve. A. Nien was twelve. B. Nien has twelve. C. Nien is twelve. Câu 4: Nien/ be/ not/ old/ enough/ be/ Hoa’s class. A. Nien wasn't enough old to be in Hoa's class. B. Nien isn't old enough to be in Hoa's class. C. Nien wasn't old enough to be in Hoa's class. Câu 5 Nien/ be going/ visit Hoa/ Christmas. A. Nien is going visit Hoa on Christmas. B. Nien is going to visit Hoa at Christmas. C. Nien was going to visit Hoa in Christmas.