4、gleeful

　　adj. 欣喜的; 高興的; 令人愉快的;

　　【例句】He took an almost gleeful delight in showing how wrong they can be.

　　他幾乎是幸災樂(lè )禍地指出他們大錯特錯。

　　5、tactful

　　adj. 婉轉; 得體的; 機智的，機敏的; 老練的，圓滑的;

　　【例句】He had been extremely tactful in dealing with the financial question

　　他在處理這個(gè)財務(wù)問(wèn)題時(shí)很有分寸。

　　6、hopeful 英[hpfl] 美[hopfl]

　　adj. 抱有希望的; 給人以希望的;

　　n. 有成功希望的人;

　　【例句】I am hopeful this misunderstanding will be rectified very quickly

　　我相信這個(gè)誤會(huì )將很快得到糾正。