atmosphere (大气), because this is where the weather forms (形成). They send these pictures to the 2. ________ station. So the scientists there can see the weather of any part of the world and tell how the weather will change. Today, nearly five hundred weather stations in sixty countries can 3. ________ satellite pictures. 4. ________they receive the new pictures, they compare (比较) them with the earlier ones. Perhaps they may find that the clouds have 5. ________ during the last few hours. This may mean that the weather on the ground may soon change, too. In their next weather 6. ________, they can tell people about it. So the weather satellites are of a great 7. ________ to the scientists at the station. In the past they could forecast the weather for about 24 or 48 hours 8. ________. Now they can make good forecasts for three 9 ________ five days. Soon, perhaps, they may be able to forecast the weather 10. ______ a week or more ahead. Answers:

一1.good 2.two 3. may 4.sand 5.strong 6. stay up 7. afraid 8.houses 9.now 10.if

二 1.brought 2.mended 3. forgot 4. beside 5.picked 6. stopped 7. mine 8.each 9. same 10. lucky

三 1. called 2.didn’t speak 3. and 4.idea 5. what 6.quietly 7.garden 8.heard 9.do 10. eaten

四 1.outside 2.for 3. so 4. lost 5. anybody 6.strong 7. well 9. clever 8. happier 10. telephone

五 1 heard 2. tell 3. guard 4. other 5. drum 6. more 7 . flew 8. army 9. with 10.ways

六 1.faster 2.In 3. watching 4. come 5. before 6. so 7. ago 8. its 9. cannot 10. shining 七

1． problem 2.never 3. interested 4.get away 5.eyes 6. running

7.tired 8.have 9.think 10.miss

八 1.find 2.desert 3.enough eful 5.make 6. carrying 7. moving 8. another 9.friendly

10.trouble

九 1they 2. how 3. spent 4. carefully 5. winter 6. dancing 7. show 8. best 9. open 10. only

十 1.France 2.hot 3. beard 4. photo 5. office 6. passport 7. second 8. Suddenly 9. teach 10. in surprise

十一 1.inventor 2. asking 3.how 4.so 5. more 6.to be 7.interested 8.playing 9. safety

10.thankful

十二 1 .sleeping 2.dreams 3.like 4. again 5. about 6. thinking 7. wake up 8. quickly 9. more 10. why

十三 1.hunting 2. dog 3. looked for 4,killed 5. dying 6. wolf. 7. back 8.Tears 9. his10. reminds 十四 1.satellites 2.weather 3.receive 4.When 5.changed 6. forecast 7. help 8.earlier 9. or 10. for