1 The Mayan civilization flourished on the Yucatan peninsula of Mexico. ��

A profited B gained C benefited D prospered ��

2 The field of international finance involves policies and procedures that affect the flow of money and credit among countries. ��

A appraisal B numeration C availability D circulation��

3 When an electric current flows through a wire, a magnetic field appears around the wire. ��

A travels B vibrates C alternates D fluctuates��

4 It was difficult to see ships in the distance because of the fog. ��

A sweat B haze C dew D frost��

5 Many tourists are attracted to the New England states by the autumn foliage. ��

A weather B leaves C festivals D harvest ��

6 Though chess players may now compete against computers, they still follow rules that were used over 800 years ago. ��

A come after B abide by�� C recite D allow��

7 The harpsichord, developed during the Middle Ages, was one of the forerunners of the piano. ��

A competitors B imitators�� C predecessors D offspring ��

8 Strict sanitary procedures help to forestall out-breaks of disease. ��

A prevent B control C minimize D preview��

9 Even the best-build machine will not run forever without proper maintenance. ��

A eternally B smoothly C dependably D accurately��

10 For financial reasons, scientists are often compelled to forsake their research. ��

A extend B resume C abandon D redirect��

11 Archaeologists have discovered fossils of million-year-old animals in excavations. ��

A remnants B graves C records D paws��

12 The oldest preserved manuscripts are those written on papyrus, which were found in Egyptian tombs. ��

A protected B hidden C sought D discovered ��

13 Mary frosted the cake.

A served B iced C split D cooled��

14 In the first decades of the twentieth century, the individual gene could not be seen, but could be worked with fruitfully. ��

A blindly B completely�� C productively D carefully��

15 Grounded whales often struggle fruitlessly to reenter deep water. ��

A violently B desperately�� C in vain D at length

答案：1. D2. D3. A4. B5. B 6. B7. C8. A9. A10. C��11. A12. D13. B14. C15. C