81.tend v. ①倾向，趋向

It tends to be snowing at this time of year.每年的这个时候天该下雪了。

The doctor tends to get angry if you ask her more questions.你要再问她更多问题那个大夫该发火了。

②照顾，照料

Her mother tends her during her illness.她生病期间妈妈照顾她。

How comes the nurses tending the patient fall ill one after another? 照料那位病人的护士怎么会一个接一个生病呢？

82.theme n.主题

What was the theme of your discussion? 你们讨论的中心话题是什么？

He paused and returned to his favourite theme.他稍做停顿就又回到他喜欢的主题上了。

83.theory n.理论

It’s said that few people really understood his theory then.据说那时候很少有人真正明白他的理论。

He’s famous for his theories on black holes in space.他以其空间黑洞理论驰名。

84.timetable n.（火车、公共汽车等）时间表, （学校）课表

Will you please show me the school timetable？请把学校的课程表给我看看好吗？

There seems to be something wrong with the train timetable.火车时刻表似乎出错了。

85.tonight ad. & n.今晚，今夜

See you at eight, tonight then.那么我们今晚八点见吧。

Are you doing anything tonight? 今天晚上你有事要做吗？

Tonight is still cloudy and windy.今天晚上天气依然是多云有风。

Such were tonight’s football results.上面是今晚足球赛的结果。

86.tough a. ①坚硬的, 结实的

I bought a tough pair of shoes specially for the climb.我专门为登山买了双结实的鞋子。

The material feels as tough as leather.这种材料摸上去和皮革一样坚韧。

②棘手的，难解的

It’s tough to find a good job these days.眼下找份好工作很难。

What a tough journey they’ve made! 他们完成了一段多么艰难的旅程啊！

87.update v.更新，使现代化

They keep on updating the dictionary.他们总是更新字典的内容。

How often do you update your computer system? 你们每隔多长时间更新一次计算机系统？

n.更新，现代化

Maps need regular updates.地图需要不断更新。

The update of the software took me more than one and a half hours.软件的更新花了我一个半小时还多。

88.upset a.心烦的，苦恼的

She was upset at not being invited to the palace ball.她因为没有被邀请参加宫廷舞会而心烦。

Why does your husband look upset? 你老公怎么看上去很苦恼？

89.virus n.病毒

Many scientists in the world are researching into the new flu virus.世界上很多科学家在研究那种新型流感病毒。

My PC is attacked by a virus infection.我的个人电脑被病毒感染了。

90.volunteer n.志愿者，自愿者

This work is all done by volunteers.这些工作全是志愿者们完成的。

More and more volunteers joined in the project.越来越多的志愿者加入这个项目。

v.自愿，自告奋勇

She volunteered to help me with my computer skill.她自愿帮助我学习计算机技术。

Does anybody volunteer for relief work? 有人自告奋勇参加救济工作吗？

91.website n.网址

May I have your website? 可以告诉我你的网址吗？

You can log on our website for further information.要获取更多信息你可以登录我们的网址。

北京市第二十中学 程家庆