ultimate adj.最终的

同final, terminal, eventual (来源：EnglishCN.com)

"Our ultimate goal is to find a cure for AIDS," said the scientist.

"我们最终的目标就是找出治愈艾滋病的方法，"那位科学家说道。

vacant adj.空的n. vacuum

同empty, available, disengaged, unoccupied

Children in the neighborhood liked to play in a nearby vacant lot.社区里的小孩儿喜欢在附近的空地上玩耍。

waive v.放弃

同give up, relinquish, renounce, abandon

Our school waives its strict dress code once a week and allows us to wear what we want on that day.

我们学校每周有一天解除严格的服装限制，我们在那一天穿便服。

Xerox v.复印(Xerox是一种复印机的商标)

同copy

Ms. Harris asked her secretary to Xerox seven copies of the contract.

哈里斯女士要求她的秘书将这份合约复印七份。

Exercise: Fill in the blanks.

1. The townspeople _____ against the soldiers who had attacked their homes.

2. You shouldn't be so _____ about an old pair of smelly sneakers.

3. The broken bridge _____ their effort to cross the river.

4. Winning an Olympic gold medal was the _____ goal in her skating career.

5. The building next to my house had been _____ for several months.

解答?1. Retaliated 2. Sentimental 3. Thwarted 4. Ultimate 5. vacant