viết lại câu dùng câu bị động khách quan (impersonal passive) 1) people say that Ha Long Bay consists of two thousand islands 2)they thought that the temple had been destroyed by a fire 3)the police have reported there is an accident on the road to Sa Pa 4)we are expecting the park will be recognized as a World Heritage Site by UNESCO next year 5)everyone believes on Son Doong Cave is one of the largest caves in the world