Student A: “What were you doing at 10 p.m. last night?” Student B: “______________”87/300Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best completes each of the following exchanges. Student A: “What were you doing at 10 p.m. last night?” Student B: “______________”I talked to my dad.I’m studying for an exam.Nothing. I was asleep.I’ve done my homework.Giải thíchChọn C