5個有哪些加了less后綴的單詞

　　例句：

　　He dismissed the opinion polls as worthless.

　　他認為民意測驗毫無用處而不予考慮。

　　Training is worthless unless there is proof that it works.

　　訓練并無價值，除非證明其有效。

　　An agreement is worthless till our name is written with a pen.

　　除非用筆把我們的名字寫下來，否則協議毫無價值。

　　The closure left 500 people jobless.

　　這次倒閉使500人失業。

　　They joined the ranks of the jobless.

　　他們加入了失業大軍。