Complete Anna039;s letter to a magazine. Use the present simple of

Complete Anna's letter to a magazine. Use the present simple of the verbs the box.not know, not say, not talk, not understand, not what.
I (1).........the lessons. I think my brother knows, but he (2).........anything. We (3)............. about our problems. I often talk to my friends on the Internet about it. They help me a lot. They (4)........my real name, so I can tell them everything. I(5)........to tell my parents about it, but they know I'm not happy.
What's your advice?
Anna