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1. cost n .[U] 费用，代价
对于许多父母来说,两份薪水支付上学的费用是很基本的.For many parents, two salaries are essential to cover the cost of (= pay for) school fees.
v .[T] cost, cost "How much does this book cost (= What is the price of this book)?"
costly : adj. expensive: 昂贵的
2 cover
v.①.采访，报道She covered the outbreak of bird flu in Viet Nam. 她在越南采访有关禽流感暴发事件。
②. 掩饰，隐藏She laughed to cover her anxiety.她试图以笑来掩饰她的焦虑。
③（不用被动语态）行过（路程），学过We covered about 30 miles a day.我们每天大约走三十英里。
④（钱）足够付Is the money enough to cover the tuition?这笔钱付学费够吗？
3 eager adj.渴望的，be eager for sth. 热切/渴望He was eager for success.
be eager to do sth.渴望做某事
eager anxious 都有"渴望"之意，Eager带有更多的热切、兴奋的情绪。Anxious带有更多的焦虑的心情。
4 case 事实，实情，情况,事例，实例
in case 以防；可能；in case of 如果；万一
in that/this case 在那样/这种情况下 in no case 决不
▲注意：in case 的从句常用一般现在时表示将来，或should +do.
1.________ fire, ring the alarm bell. 2.__________ he comes, let me know.
3.__________ should the bird flu be spread.
4.It might rain tomorrow. _________ we will have to put off the sports meet until next Friday
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发表于 2016-7-12 13:47:24