sentence1: I am the first on Earth , the second in Heaven . I appear two times in a week you can only see me once in a year . Although I am in the middle of the sea , l am not found in month , but l am in February , June , September , October , November & December . What am I ?
sentence2: I am good at studies but I am unable to solve questions of my level on Internet or anywhere else . What 's the matter with me ?