1。He spent an hour in studying Chinese. 2. He spends an hour in playing the piano everyday. 3.He's the last one to come to the party. spend 的用法是:spend…in doing sth./spend…with/on sth.
He spends one hour in studying Chinese. It takes him one hour every day to play piano. 这个,朋友第三题,既然是the了,就得用比较级,最高级吧。。。 He was the latest one came to the party.