用适当的单词完成下列句子(不能改变原句的意思) Mr. Smith has been a teacher for five years. It has been five years Mr. Smith became a teacher. He spends an hour going to school every day. It him an hour to go to school every day. He can’t take care of his baby because he is very busy. He is busy to take care of his baby. I hear one of my friends will join me in the job. I hear a friend of ________ will join me in the job. I believe he will do a good job. I believe he will do the job ________.