初二英语（短文填空,一空一词）
Once Einstein was waiting for one of his friends.While he was waiting,he became in deep _____.It began to rain.The rain kept on for some time.When he ______out a piece of paper from his pocket to write something down,the paper was _____ and then he knew that it was raining.His clothes had become wet from the rain.But after he put the paper into his pocket,he ______he was standing in the rain again.This is because they are too _____in their studies.