2011年08月08日 07时56分，《今年英语:2011自考英语（二）复习资料：UNIT3》由出国留学网liuxue86.com英语编辑整理.
一、word study
request,ensure,oppose,burden,open up
① request n./vt.请求，要求
request 后面接 for，表示要求的对象；“根据要求”为 by(或 on) request；“应。。。之要求”则 为 at sb’s request。
He made a request for immediate help.
他要求立即给予帮助。 Minibuses stop by request. 小公共汽车招手即停。
Instructions will be sent immediately on(upon) request.
说明将按要求立即寄出。
The singer gave one more song at our request. 歌唱家在我们的要求下又唱了一首歌。 Your silence is requested.
请勿说话。
② ensure vt.保证，担保
ensure 后面接 against 或 from，表示“保证。。。免于。。。”；后面接 to 或 for，则表示“保证。。。 具有。。。”。
We can ensure that the work w ill be done in the right way.
我们可以保证把工作做好。
The police can ensure the witness against (或 from) danger.
警察能保证证人免受危险。
This measure ensure to (或 for) us a voice in the matter.
这项措施使我们在这件事上具有发言权。
③ oppose vt.1、反对，反抗；2、使相对，使对抗（to）
Many people opposed building a new highw ay because of the great cost.
由于代价过于高昂，许多人都反对修一条新公路。
To the difficulties she opposed a will of iron.
她用钢铁般的意志对待困难。
What he said was totally opposed to the facts.
他说的与事实完全相反。
We are firmly opposed to this dirty political deal.
我们坚决反对这场肮脏的政治交易。
④ burden n.1、担子，负担；2、责任，义务
She bore the w hole burden of raising two children.
她一个人负起抚养两个孩子的全部责任。
The burden of running the factory is too heavy for his failing health. 管理这家工厂的重担对他日益恶化的健康来说是太重了。 vt.使负重担；麻烦，劳累
The mother w as burden w ith w orries.
妈妈忧心忡忡。
Students are heavily burdened with home assignments.
学生家庭作业负担过重。
⑤ open up
1、打开；2、开办，开辟，开发；3、坦诚地或无拘无束地谈话 They opened up his stomach to get at the source of the trouble. 他们给他的胃开了刀，以找出病根。
They opened up a mine in the remote areas.
他们在那个偏远地区开了矿。
They decided to open up a business in the town.
他们决定在城里开一家店。
The girl decided to open up and tell us everything.
这个女孩决定坦诚地告诉我们一切。
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