Mr.Brown is kind___people .but sometimes he is kind____ seri

Mr.Brown is kind___people .but sometimes he is kind____ seri Mr Brown is vrey healthy ( ) he is 80 years old ? A BUT B th 英语翻译Mr.Brown is a doctor.But he doesn't help people.He helps Mr Li is kind ()us,but sometimes he is kind () serious Mr.Zhou is kind （）us,but sometimes he is kind () strict with Mr Li is kind _____ us,but sometimes he is kind _____ seriou Mr Wang is kind( )us ,but sometimes he is kind( )serious 怎么填 Where is Mr.Brown?He is at ___ Mr Brown is vrey healthy ( ) he is 80 years old their dad is mr,white ,he is in a brown coat,their mom is mr This is Mr lee.He is a teacher.This is Mr Brown. He is Mr.Brown's son.(改为否定句)