1.Few cities build new airports. Instead, most cities expand or _____ their existing airports.

　　A.change B. move C.switch D. renovate

　　2.The amphibians were hunters, _____ worms and insects.

　　A.bringing B. preying C.taking on D. insisting on

　　3._____ the child, the parents stopped fighting.

　　A. For the sake of B. For the convenience of C.On the strength of D. On the base of

　　4._____, glass can correct most sight defects in healthy eyes.

　　A.When well fitted B. Well fitted when C. Well fitted if D. If well fitted when

　　5.Those people _____ a general understanding of the present situation.

　　A.lack of B. are lacking of C.lack D. are in lack

　　6.The money is to be used to keep a space vehicle on the moon busy _____ back to the earth photographs and other information about the surface of the moon.

　　A.to send B. being sent C.to be sent D. sending

　　7.Determining the mineral content of soil samples is an exacting process, _____, experts must perform detailed tests to analyze soil specimens.

　　A.so that B. however C.afterwards D. therefore

　　8.By taking second and third jobs, farm workers in Japan maintain an _____ household income slightly higher than that of urban workers.

　　A.common B. ordinary C.average D. general

　　9. _____ the fact that women often make valuable contributions, they have not been able to attain the same social and economic status as men.

　　A.Regardless B. Despite C. In spite D. Nevertheless

　　10. This story _____ a picture of fascinating life on the lonely island.

　　A.takes up B. builds up C.conjures up D. opens up