15. "If you pass your test, I'll buy you a car", he said. a. He said that If I pass my test, he'll buy me a car. b. He said that If you pass your test, he would buy you a car. c. He said that If I pass my test, he would buy me a car. d. He said that If I had pass my test, he would have bought me a car. 16. "If you passed you test, I would buy you a car", he said. a. He said that if I passed my test, he would buy you a car. b. He said that if you had passed your test, he would have bought you a car. c. He said that if I had passed my test, he would have bought me a car. d. He said that if you passed your test, he would buy you a car. 17. "If you'd passed your test, I'd have ought you a car", he said. a. He said that I'd passed my test, he'd have bought me a car. b. He said that if I passed my test, he would buy me a car. c. He said that if you had passed your test, he would have bought you a car. d. He said that if you had passed your test, he would buy you a car. 18. "What a silly boy you are!" she exclaimed a. She told him what a silly boy you are. b. She told him what a silly boy he is. c. She told him what a silly boy he was. d. She told him what a silly boy you were. 19. The police officer said to us, "Where are you going?" a. The police officer asked us where we were going? b. The police officer asked us where were we going? c. The police officer asked us where are we going? d. The police officer asked us where we are going? 20. Clair asked, "What time do the banks close?" a. Claire wanted to know what time the banks close? b. Claire wanted to know what time do the banks close? c. Claire wanted to know what time did the banks close? d. Claire wanted to know what time the banks closed. Cho mình cả lời giải thích nx nhé ạ, chuyển từ thì nào sang thì nào, từ nào chuyển nx ạ cảm ơn