1. Geographers examine tiny fragments of animals and plants found in sediment to date the stratum.
(A) families (B)skeletons (C)pieces
2. Janet’s goal is to become a successful businesswoman so she spends all her money on MBA study.
(A)competition (B)objective (C)subject
3. The large towers of the George Washington Bridge were not encased in masonry(砖瓦)but were left exposed to reveal their handsome steel structure.
(A) naked (B) well-worn (C) good-looking
4. Corn, potatoes, and other plants first cultivated in the Western Hemisphere now furnish almost half the world's food supply.
(A) replace (B) provide(C) consume