把下列各题的俩句话合并成一个带定语从句的复合句。 1)The students will not be able to pass the English exam. They don’t work hard enough. 2)The teacher is my physics teacher . You saw him on the playground just now. 3) The woman is an English teacher. She is standing at the school gate. 4) This is the girl. Her sister is a famous singer. 5) The book is good. I am reading.