Dear Miss Help,    I feel very down. I’m the mother of a ninth-grader. My sonwas still a good boy one year ago. Before, Sam studied very hardand helped me do the housework on weekends. He also sharedhis school life with me . However, he is different now. He getsbad grades in all his subjects. He often goes out with his friendsand comes home very late. He doesn’t let me know where he isgoing or whether he will be home for dinner. Also, he is seen tosmoke outside the school. He seldom talks to us now. Myhusband and I love Sam with nothing but our heart. We want toknow if he has problems, and what we can do to help him. Ireally miss my good boy. Can you tell me what to do?
【題組】36. This letter was written by_____ .
(A)Sam.
(B)Sam’s father.
(C)Sam’s mother.
(D)Sam’s teacher.