If I were a monitor ，I would make a great contribution to our class.For example ,I will be in charge of our class when our head teacher is not in. when my classmates have any difficulty ,I 'd like to help him.
自己功课自己做，否则你永远不会进步的 自己先写好，放在这里，自然有人替你修改 ------------------------------------------------------------- 你应该写的：If I were a monitor ，I will make a great contribute （contributions）on （to） for the class。