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
他在處理這個財務問題時很有分寸。
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
我相信這個誤會將很快得到糾正。