7．American women usually identify their best friends as someone _______ they can talk frequently．（ ）
| A． | who | B． | with whom | C． | as | D． | about which |
5．
Ecotours are unique adventures that join nature and sightseeing into one exciting package．Learning about the environment and the world around us is the （41）B of an ecotour because you get to experience the natural world firsthand．A great way for students studying biology and environmental sciences to experience （42）G life and nature is to take your own ecotour!Orlando airboat rides can give you an experience to remember and can be a fun and（43）E way to learn more about the Florida environment．
Ecotours involve travelling to a natural environment where you are guided by a（n） （44）H
helping you learn about the surrounding environment and extend your environmental education．This can include learning how the plants and animals on your Orlando airboat rides（45）C from each other，or you can be simply becoming more aware of preservation efforts towards the Everglades，the largest wetland in North America．
Orlando airboat rides can help you learn about Florida history，observe alligators （短吻鳄） and other wildlife，and experience the （46）Knature of the muddy wilderness．Taking an ecotour can help you become more aware of your environment and further instruct you on the impact we have on the environment．Our goal is to help you understand the Everglades and how important it is to （47）I the wetland．
Wild Florida provides the perfect opportunity for a school trip that satisfies those （48）F with learning more about environmental sciences，or to those just curious about the Everglades．Hands-on and active learning on an airboat ride is often a more exciting and adventurous （49）A to sitting in a classroom，so why not plan your ecotrip with Wild Florida？
Wild Florida is reputable for （50）Jin creating an exciting and unique ecotour that's fun for everyone in your family!You will be flying through the muddy Everglades in our airboat rides while observing and learning about alligators，bald birds，the history of the Everglades，and so much more．Book your Orlando airboat rides today by calling us at 407-901-2563to experience a one-of-a-kind ecotour that you won't soon forget．
| A．alternative | B．appeal | C．benefit | D．differ | E．energizing | F．fascinated |
| G．marine | H．naturalist | I．preserve | J．specializing | K．unspoiled |
Ecotours involve travelling to a natural environment where you are guided by a（n） （44）H
helping you learn about the surrounding environment and extend your environmental education．This can include learning how the plants and animals on your Orlando airboat rides（45）C from each other，or you can be simply becoming more aware of preservation efforts towards the Everglades，the largest wetland in North America．
Orlando airboat rides can help you learn about Florida history，observe alligators （短吻鳄） and other wildlife，and experience the （46）Knature of the muddy wilderness．Taking an ecotour can help you become more aware of your environment and further instruct you on the impact we have on the environment．Our goal is to help you understand the Everglades and how important it is to （47）I the wetland．
Wild Florida provides the perfect opportunity for a school trip that satisfies those （48）F with learning more about environmental sciences，or to those just curious about the Everglades．Hands-on and active learning on an airboat ride is often a more exciting and adventurous （49）A to sitting in a classroom，so why not plan your ecotrip with Wild Florida？
Wild Florida is reputable for （50）Jin creating an exciting and unique ecotour that's fun for everyone in your family!You will be flying through the muddy Everglades in our airboat rides while observing and learning about alligators，bald birds，the history of the Everglades，and so much more．Book your Orlando airboat rides today by calling us at 407-901-2563to experience a one-of-a-kind ecotour that you won't soon forget．
4．
Not so far in the distant past a study on water pollution found that common，everyday makeup products being washed down the drain was ending up in well and drinking water．Now a study has found that people pollute themselves．Many of the pollutants are linked to cancer and other serious health（41）B．What's the key cause of this pollution？Common household items，（42）I，appear to be used more by women than men．These include makeup，hair spray and commercial，chemically-made perfumes．These are perfumes that are（43）Fadvertised as having some sort of beneficial effect on the body and are even suggested as a replacement for natural essential oils．Studies on the effectiveness of fragrance oils and health benefits have been（44）E，something neglected to be mentioned．If the chemical scent has cancer-causing properties，it may not make sense to try and use it for helping you sleep or（45）Ayour blood pressure．Manufacturers argue that the risk is non-existent as the levels of chemicals found in the tests were so small．However，with over 60chemicals being found，many of which were non-existent before the turn of the century，researchers make note that these chemicals may be enough to cause problems．
Since the products mentioned are often used by women，it leaves one to wonder if conditions，（46）Dunheard of before the turn of the century，are linked to man-made chemicals？Perfumes in particular，when chemical，have been linked to asthma（哮喘） and other sensitive（47）G．Some groups are asking the government to order manufacturers to place（48）Clabels on each bottle．
Essential oils and real fragrance oils provide a wonderful （49）Hto commercial fragrances．They also have other properties and effects on the body which have been scientifically proven．In addition，you can actually formulate your own scent quite easily!There are many books on perfume（50）Kand the use of essential oils，some quite in-depth and others rather fun．Nowadays there are also many companies making perfumes from pure essential oils．
| A．lowering | B．conditions | C．warning | D．seemingly | E．inconclusive | |
| F．frequently | G．reactions | H．alternative | I．interestingly | J．properties | K．mixing |
Since the products mentioned are often used by women，it leaves one to wonder if conditions，（46）Dunheard of before the turn of the century，are linked to man-made chemicals？Perfumes in particular，when chemical，have been linked to asthma（哮喘） and other sensitive（47）G．Some groups are asking the government to order manufacturers to place（48）Clabels on each bottle．
Essential oils and real fragrance oils provide a wonderful （49）Hto commercial fragrances．They also have other properties and effects on the body which have been scientifically proven．In addition，you can actually formulate your own scent quite easily!There are many books on perfume（50）Kand the use of essential oils，some quite in-depth and others rather fun．Nowadays there are also many companies making perfumes from pure essential oils．
3．
We're waiting to take trips to outer space．When will it happen？According to individuals in the growing field of space tourism，it may be in five or fifty years．
Space Adventures is taking reservations for the flights，（41）H to the first manned spaceflights．The trip will cost﹩90，000，with a﹩6，000 （42）G required．More than 200people have made reservations，said Sarah，Dalton，the company spokeswoman．
John Spencer of the Space Tourism Society says that a more realistic（43）K for regular space travel is 50years．Issues of expense，difficulty，and danger must still be resolved．Oh yes-a reusable vehicle must also be invented．He adds，however，that ten years from now，a（44）D number of people may be able to visit a space station．He says he expects a fleet of private space vehicles or"space yachts"（游艇） to be in （45）B in 20to 25years．They will do what he calls"orbital super yachting．"After that，there will be cruise lines，like those that travel the Earth's oceans，as well as space hotels and resorts．
There have been only a few studies to determine the public's interest in space tourism，but they all conclude that a （46）Eof people would like to visit space and would be willing to pay good money for it．
According to expert Patrick Collins，between 5million and 20million people will head for space by 2030．He also （47）A 100flights a day leaving Earth．It would be （48）Jto have more than 100hotels in Earth's orbit（轨道），a few more orbiting the moon，and a few on the moon's surface．These hotels would （49）C more than 100，000people，who would work month-long shifts．Each hotel would have a service station．Such service stations would provide oxygen，water，and hydrogen．They might also ship（50）F safe electric power back to Earth．
If all the issues can be resolved，Collins says that space tourism could one day become a﹩1trillion．
0 138985 138993 138999 139003 139009 139011 139015 139021 139023 139029 139035 139039 139041 139045 139051 139053 139059 139063 139065 139069 139071 139075 139077 139079 139080 139081 139083 139084 139085 139087 139089 139093 139095 139099 139101 139105 139111 139113 139119 139123 139125 139129 139135 139141 139143 139149 139153 139155 139161 139165 139171 139179 151629
| A．predicts B．operation C．employ D．limited E．majority F．environmentally G．deposit H．similar I．dreams J．necessary K．estimate |
Space Adventures is taking reservations for the flights，（41）H to the first manned spaceflights．The trip will cost﹩90，000，with a﹩6，000 （42）G required．More than 200people have made reservations，said Sarah，Dalton，the company spokeswoman．
John Spencer of the Space Tourism Society says that a more realistic（43）K for regular space travel is 50years．Issues of expense，difficulty，and danger must still be resolved．Oh yes-a reusable vehicle must also be invented．He adds，however，that ten years from now，a（44）D number of people may be able to visit a space station．He says he expects a fleet of private space vehicles or"space yachts"（游艇） to be in （45）B in 20to 25years．They will do what he calls"orbital super yachting．"After that，there will be cruise lines，like those that travel the Earth's oceans，as well as space hotels and resorts．
There have been only a few studies to determine the public's interest in space tourism，but they all conclude that a （46）Eof people would like to visit space and would be willing to pay good money for it．
According to expert Patrick Collins，between 5million and 20million people will head for space by 2030．He also （47）A 100flights a day leaving Earth．It would be （48）Jto have more than 100hotels in Earth's orbit（轨道），a few more orbiting the moon，and a few on the moon's surface．These hotels would （49）C more than 100，000people，who would work month-long shifts．Each hotel would have a service station．Such service stations would provide oxygen，water，and hydrogen．They might also ship（50）F safe electric power back to Earth．
If all the issues can be resolved，Collins says that space tourism could one day become a﹩1trillion．