19．In a little-known part of the counter-terrorism world.one of the most effective detection systems——青夏教育精英家教网—

19．In a little-known part of the counter-terrorism （反恐怖主义） world，one of the most effective detection systems is a 600-pound animal that works for about 20pounds of fish a day．
Since the 1960s，the United States and a handful of other countries have trained dolphins and sea lions to detect sea mines and swimmers，and to recover worn--out torpedoes （鱼雷） and testing objects used in naval （海军的） exercises．
The U．S．Navy kept its Marine Mammal Program a secret until the 1990s，and this spring CNN became one of the first members of the media to witness firsthand how the program works．
The program trains about 75Pacific bottlenose dolphins，with natural biosonar （生物声纳） that tracks better than any manmade device； and 35California sea lions，with very good underwater eyesight．
Not only do these trained marine mammals track and save millions of dollars in U．S．military equipment，they are also helping to save lives．The Navy won't reveal whether the dolphins and sea lions have effectively stopped terrorists attempting to do harm to the U．S．
A key part of the training program is teaching these mammals how to stop potentially unfriendly swimmers．The program is also positioned to defend against swimmer terrorist attacks as well．
In the digital age，it seems that there should be more advanced approaches to guard the Navy's most expensive things．But according to Rothe，the program director，nothing in today's high-technology world can compete with these mammals'biosonar abilities．"I hope that one day there is a robot or a UUV （un-manned underwater vehicle） that makes the mammal program out of date，"he said．"But right now this is the best thing out there．"
25．The U．S．Marine Mammal Program trained marine mammals toA．
A．stop dangerous swimmers
B．catch 20pounds of fish a day
C．destroy sea mines
D．fire torpedoes
26．What can we learn from the last paragraph？A
A．The trained dolphins are the best way of protection available to the U．S．Navy．
B．There will be dolphin-like robots in the future according to Rothe．
C．The mammal program will become useless soon．
D．Rothe has no faith in today's high technology．
27．Which of the following is TRUE according to the text？D
A．Many countries have trained sea animals for counter-terrorism．
B．The Marine Mammal Program was a secret until the 1960s．
C．The trained sea animals have already stopped some terrorists．
D．The U．S．Navy has trained both dolphins and sea lions．

18．Having returned from her round trip，the angry woman stood outside the ticket office of the station．"The railway owes me 12，"she said to Harry Jenks，the young man working at the office．"You sold me a ticket for May 22nd，but there was no ship to Jersey that night．So my daughter and I had to stay in a hotel．It cost me12．"
Harry was worried．He remembered selling the woman a return ticket．"Come into the office，Madam，"he said politely．"'I'll just check the Jersey timetable for May 22nd．"
The woman and her little girl followed him inside．She was quite right，as Harry soon discovered．There was no sailing on May 22nd．How could he have made such a careless mistake？He shouldn't have sold her a ticket for that day．Wondering what to do，he smiled at the child．"You look sunburnt，"he said to her．"Did you have a nice holiday in Jersey？"
"Yes，"she answered，shyly．"The beach was lovely．And I can swim too!""That's fine，"said Harry．"My little girl can swim a bit yet．Of course，she's only three…"
"I'm four，"the child said proudly．"I'll be four and a half．"Harry turned to the mother．"I remember your ticket，Madam，"he said．"But you didn't get one for your daughter，did you？"
"Er，well…"the woman looked at the child．"I mean…she hasn't started school yet．She's only four．"
"A four-year-old child must have a ticket，Madam．A child's return ticket to Jersey costs…let me see…13.50．So if the railway pays for your hotel，you will owe 1.50．The law is the law，but since it's me who made the mistake…"
The woman stood up，took the child's hand and left the office．
21．Harry was worried becauseB．
A．the woman was angry with him．
B．he had not done his work right．
C．the Jersey timetable was wrong．
D．the little girl didn't have a return ticket．
22．Harry started talking to the little girlA．
A．because he was in difficulty and did not know what to do．
B．because he had a little girl about the same age．
C．because he wanted to be friendly to the little girl who looked so nice．
D．when he suddenly realized that he could find a way out from the little girl．
23．The underlined sentence means thatD．
A．they must follow the law without other choice，even though the mistake was his．
B．he had to be strict with the woman because of the law，although he didn't want to．
C．the woman had to pay him1.50and the railway would pay her for the hotel．
D．she should pay1.50，but as he had made a mistake，she could go without paying．
24．The woman left the office without saying anything becauseD．
A．she wanted to go home and get money for the child's ticket．
B．she was so angry that she didn't want to say anything more with the young man．
C．she was moved by Harry's kindness．
D．she knew she would have to pay for her child's ticket if she held on to her idea．

17．假设你是李华．你的美国笔友Susan要在暑假来中国桂林参加一个文化交流活动．她想提前
了解一下这座城市的相关情况，写信向你询问，请根据一下提示信息，给她回一封信．

自然情况	位于中国的南部，气候温和，风景优美
景点	四面环水，七星公园，漓江，象鼻山等
美食	桂林米粉，辣椒酱
…

注意：1．词数100左右，开头he结尾已经给出，但不计入总数；
2．可适当增加细节，以使行文连贯；
3．参考词汇象鼻山 Elephant Trunk Hill chilli sauce
Dear Susan，
I'm glad that you are coming to Guilin for an exchange program during the summer holiday．

Yours
Li Hua．

16．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有 10处语言错误，每句中最多有两处．错误仅涉及一个单词的增加、删除或修改．
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．
删除：把多余的词用（\）划掉．
修改：在错的词下画一横线（），并在该词下面写出修改后的词．
注意：1．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分．
Dear Sir or Madam，
I'm Li Hua，the middle school student from China．I read the announcement of the summer camp you have posted at the Internet and I am interested in them．I know that you welcome students from different countries and I'd like take part in it．I had been learning English for ten years，and I speak fluently English．What is much，I'll be able to tell students from other countries about China and so learn about their country as well．I hope I will be accepted as a member of your summer camp．
Looking forward to receive your early reply!
Regards，
Li Hua．

15．No one knowswhatcaused the accident．

14．If you keepyour word，you will do what you promise before．

13．Whether the other astronauts accept his idea remains a question．

12．We must do as much as wecanto make our country better and more beautiful．

11．These photos remind meof the good old days we spent together．

10．MarkTwain'snovel（小说） The Adventures of Tom Sawyer is well received by children．

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