As students across the country have their yearly flu shots（打流感疫苗）, doctors across the world are preparing against a possible outbreak of bird flu that few current vaccines（疫苗）will guard against. The likelihood of a bird flu spreading among humans is very high, the World Health Organization warned recently. European countries worry about bird flu very much, since many migratory birds（候鸟）start to fly back from the North.

There are at least 15 different types of bird flu virus around the world. The possible outbreak may be caused by a virus known as H5N1. It was first found to have spread from a bird to a human in Hong Kong in 1997. In addition to Asia, this bird flu has been found among birds in Romania, Turkey, Russia and Kazakhstan.

The outbreak in 1997 in Hong Kong was quickly controlled at a cost of 18 people ill and six dead. About 1.5 million chickens were collected in an effort to remove the source of the virus. But scientists say that the virus can change itself rapidly. Also, if the virus mixes with the human flu virus, it could be spread through person-to-person contact in the same way as ordinary human flu is spread. Bird flu can cause fever, coughing, sore throats and muscle aches in humans. With the introduction of vaccines, flu is not as deadly as it used to be. But throughout history it was a huge cause of death around the world. The outbreak of Spanish flu in 1918-19 killed about 40 to 50 million people worldwide.

Currently there is no vaccine against bird flu that can be used on humans. Scientists are working to develop one. This will probably take several months to complete and may not be ready in time to stop a widespread outbreak of the disease.

68 The author mainly tells us _____ in the passage.

A. people all over the world are worried about the outbreak of bird flu

B. there is a good chance of bird flu spreading to humans, which might be deadly

C. scientists are working together to develop vaccines against bird flu

D. throughout history, bird flu was a huge cause of death around the world

69. Which statement is NOT true?

A. The outbreak of bird flu in 1997 in Hong Kong was caused by a virus known as H5N1.

B. H5N1 wasn’t discovered until it was found among birds in Romania and Turkey.

C. The Spanish flu in 1918-19 was deadly because it was spread from person to person.

D. People infected by bird flu suffer from fever, coughing, sore throats and muscle aches.

70 We can infer from the passage that _______.

A. in several months, a widespread outbreak of the disease can be stopped

B. the bird flu in 1997 in Hong Kong was soon stopped

C. as time goes on, bird flu is becoming more deadly

D. it takes scientists great effort to stop the possible outbreak 

A group of frogs were traveling through the woods, and two of them fell into a deep pit. All the other frogs      the pit. When they saw how      the pit was, they told the two frogs that they might as well be    .

The two frogs ignored what       were saying and      to jump up out of the pit with all of their physical strength. The other frogs       telling them to stop. Finally, one of the frogs       the comments, seriously considered them, and gave up. He       down and died.

The other frog continued to jump as     as he could. Once again, the crowd of frogs shouted at him to stop the       and just die. He jumped even harder and finally      it out. When he got out, the other frogs said, “Did you not       us?” The frog explained to them that he was       . He thought they were       him the whole time.

This story teaches two lessons: First, there is power of life and death in the       . An encouraging word to someone who is        can lift them up and help them make it through the day. Second,a destructive word to someone who is down can be       it takes to kill them. Be      of what you say. Speak life to those who cross your path.

The        of words is great. It is sometimes hard to understand       an encouraging word can go such a long way. Anyone can speak words that tend to rob another of the spirit to continue in difficult times.

1.A. jumped over                B. looked through              C. came down            D. gathered around

2.A. big                       B. deep                                C. dangerous             D. wide

3.A. dead                             B. kind                                  C. quiet                       D. safe

4.A. the ones             B. another                           C. the others             D. others 

5.A. promised            B. tried                                 C. managed                D. agreed

6.A. kept                    B. enjoyed                           C. finished                  D. stopped

7.A. came up with    B. paid attention to             C. got used to   D. got along with  

8.A. slowed                         B. went                                 C. climbed                   D. fell

9.A. much                            B. straight                            C. hard                        D. fast 

10.A. pain                            B. disease                            C. fear                         D. competition

11.A. worked            B. turned                             C. left                          D. made

12.A. follow               B. hear                                 C. recognize              D. consider

13.A. deaf                           B. blind                                C. honest                    D. clever

14.A. respecting       B. comforting            C. encouraging          D. beating

15.A. society              B. communication              C. tongue                 D. misunderstanding

16.A. down                         B. angry                               C. away                       D. up

17.A. who                   B. that                     C. which            D. what

18.A. proud                        B. careful                             C. afraid                      D. free

19.A. function           B. energy                             C. power           D. skill

20.A. that            B. what                         C. whether       D. when

A group of frogs were traveling through the woods, and two of them fell into a deep pit. All the other frogs  36  the pit. When they saw how  37  the pit was, they told the two frogs that they might be  38  .

The two frogs  39  what the other frogs were saying and  40  to jump up out of the pit with all of their physical strength. The other frogs  41  telling them to stop. Finally, one of the frogs  42  the comments, seriously considering them, and gave up. He  43  down and died.

The other frog continued to jump as  44  as he could. Once again, the crowd of frogs shouted at him to stop the  45  and just die. He jumped even harder and finally  46  it out. When he got out, the other frogs said, “Did you not  47  us?” The frog explained to them that he was  48  . He thought they were  49  him the whole time.

This story teaches two lessons: 1. There is power of life and death in the  50  . An encouraging word to someone who is  51   can lift them up and help them make it through the day. 2. A destructive word to someone who is down can be  52  it takes to kill them. Be  53   of what you say. Speak life to those who cross your path.

The  54  of words is great. It is sometimes hard to understand  55  an encouraging word can go such a long way. Anyone can speak words that tend to rob another of the spirit to continue in difficult times.

A group of frogs were traveling through the woods, and two of them fell into a deep pit. All the other frogs 1 the pit. When they saw how 2 the pit was, they told the two frogs that they might be 3 .

The two frogs 4 what the other frogs were saying and 5 to jump up out of the pit with all of their physical strength. The other frogs 6 telling them to stop. Finally, one of the frogs 7 the comments, seriously considering them, and gave up. He 8 down and died.

The other frog continued to jump as 9 as he could. Once again, the crowd of frogs shouted at him to stop the 10 and just die. He jumped even harder and finally 11 it out. When he got out, the other frogs said, “Did you not 12 us?” The frog explained to them that he was 13 . He thought they were 14 him the whole time.

This story teaches two lessons: 1. There is power of life and death in the 15 . An encouraging word to someone who is 16 can lift them up and help them make it through the day. 2. A destructive word to someone who is down can be 17 it takes to kill them. Be 18 of what you say. Speak life to those who cross your path.

The 19 of words is great. It is sometimes hard to understand 20 an encouraging word can go such a long way. Anyone can speak words that tend to rob another of the spirit to continue in difficult times.

1. A. jumped over 　 B. collected about 　 C. came down 　　 D. gathered around

2. A. big 　　　 B. deep 　　　　　　 C. dangerous 　　 　 D. wide

3. A. dead 　　　　 B. kind 　　　　　　 C. quiet 　　　　 　 D. safe

4. A. tolerated 　　 B. understood 　　　 C. ignored 　　　　 D. confused

5. A. promised　　　 B. tried 　　　　　 C. managed 　　　　 D. agreed

6. A. kept 　　　　 B. enjoyed 　　　　 C. finished 　　　　 D. stopped

7. A. lived up to 　 　 B. paid attention to 　 C. got used to 　　 D. got addicted to　

8. A. slowed 　　 B. went　　　　　　 C. climbed　　　 D. fell

9. A. hardly 　　 　 B. difficult 　　　 C. hard 　　　　　　 D. difficultly

10. A. pain 　　　　 B. disease 　　　　 C. fear 　　　　　　 D. competition

11. A. worked 　　　 B. turned 　　　 C. left 　　　　　　 D. made

12. A. follow 　　　 　 B. hear 　　　　　　 C. recognize 　　 　 D. consider

13. A. deaf 　　　　 B. blind 　　　　　 C. honest 　　　 D. clever

14. A. respecting 　 　 B. comforting 　　　 C. encouraging 　　 D. beating

15. A. society　　　 　 B. communication 　 C. tongue 　　　 D. misunderstanding

16. A. down 　　　　 B. angry 　　　　 　 C. away 　　　　 　 D. up

17. A. who　　　 B. that 　　 　　　 C. which 　　　　 D. what

18. A. proud 　　 　 B. careful 　　　　 C. afraid 　　　 　 D. free

19. A. function 　　 B. energy 　　　 C. power 　　　　 D. skill

20. A. that　　　 　 B. what　　　　 　　 C. how　　　　 　 　 D. when