22、
A.He will further his study in the same university.
B.He will go traveling and enjoy life with his wife.
C.He will go back to the way he usually lives.
D.He will go back to his hometown.
23、听音频，回答下列问题：
A.Why consumers do not want to buy organic food
B.How to increase the sales of the organic food in their supermarket.
C.Why is organic food scientifically healthy.
D.How to persuade the housewives to purchase organic food
24、
A.They hold a skeptical attitude toward the value of organic food.
B.They think it can avoid their exposure to chemical pesticides and fertilizers.
C.They think it is safer and healthier to consume.
D.They are convinced that organic food is not worth the money.
25、
A.It should be bought in the right season.
B.It should be bought when there is a discount.
C.It should be purchased after its price being compared
D.It should be purchased when it is out of season.
26、
A.Organic food cannot be consumed for a long time.
B.Food labeled organic may contain certain amount of pesticides.
C.Organic food should not be bought in bulks because it is difficult to preserve.
D.Food labels are usually not reliable.
27、听音频，回答下列问题：
A.The scientists plan to precisely measure that temperature difference.
B.The scientists plan to launch a rocket.
C.The scientists plan to study the temperature received from the sun.
D.The scientists plan to study the array of the satellite.
28、
A.Bill Swartz wants to measure the temperature.
B.Bill Swartz wants to gather the information of temperature.
C.Bill Swartz wants to predict the earth temperature.
D.Bill Swartz wants to predict the Earth's changing climate.
29、
A.It is very expensive.
B.It is easy to control.
C.It is environment-friendly.
D.It is very black.
30、听音频，回答下列问题：
A.In 1946.
B.50 years ago.
C.15 years ago.
D.After the general died
31、
A.Smoking is good
B.Many US are least like smoking.
C.Half the U.S. population smoked and the other half smoked second-hand smoke.
D.It is culture that smoking is totally fine.
32、
A.Healthy care center generals' report reveals the negative use of tobacco.
B.Professor generals' report reveals the negative use of tobacco.
C.Doctor generals' report reveals the negative use of tobacco.
D.Surgeon generals' report reveals the negative use of tobacco.
33、听音频，回答下列问题：
A.Radar technology that is searching for a lost aircraft.
B.Radar technology that is searching for the potential enemies.
C.Radar technology that is searching for army maps.
D.Radar technology that is searching for geographic information.
34、
A.Not until the search for survivors ends.
B.Not until the search for survivors begins and a search for answers ends.
C.Not until the search for survivors ends and a search for answers begins
D.Not until the search for answers begins.
35、
A."Pings" are the sounds that airplane made.
B."Pings" are the sounds those black boxes made.
C."Pings" are the sounds that radar made.
D."Pings" are the sounds those ships made
36、
A.It is very slow.
B.It is very difficult.
C.It is very easy.
D.It is very fast.