9、Techniques to employ the energy of the sun are being developed.

　　A) convert

　　B) store

　　C) use

　　D) receive

　　標(biāo)準(zhǔn)答案： c

　　10、Since the Great Depression， the United States government has protected farmers from damaging drops in grain prices.

　　A) slight

　　B) surprising

　　C) sudden

　　D) harmful

　　標(biāo)準(zhǔn)答案： d

　　11、Cement was seldom used in building the Middle Ages.

　　A) crudely

　　B) rarely

　　C) originally

　　D)occasionally

　　標(biāo)準(zhǔn)答案： b

　　12、Medicine depends on other fields for basic information， particularly some of their specialized branches.

　　A) conventionally

　　B) obviously

　　C) especially

　　D) inevitably

　　標(biāo)準(zhǔn)答案： c

　　13、We were astonished to hear that their football team had won the champion.

　　A) amazed

　　B) amounted

　　C) amused

　　D) approached

　　標(biāo)準(zhǔn)答案： a

　　14、There is an abundant supply of cheap labor in this country.

　　A) a steady

　　B) a plentiful

　　C) an extra

　　D) a stable

　　標(biāo)準(zhǔn)答案： b

　　15、The most crucial problem any economic system faces is how to use its scarce resources.

　　A)puzzling

　　B) difficult

　　C) terrifying

　　D) urgent

　　標(biāo)準(zhǔn)答案： d