1. Geographers examine tiny fragments of animals and plants found in sediment to date the stratum.

families skeletons pieces

2. Janet’s goal is to become a successful businesswoman so she spends all her money on MBA study.

competition objective subject

3. The large towers of the George Washington Bridge were not encased in masonrybut were left exposed to reveal their handsome steel structure.

naked well-worn good-looking

4. Corn, potatoes, and other plants first cultivated in the Western Hemisphere now furnish almost half the worlds food supply.

replace provide consume

答案：CBCB

解析：

pieces

n. 匹头，毛束;件片块个工件零件

She dilacerated the paper into pieces.

她把那张纸撕成碎片。

objective

adj. 客观的;目的的;宾格的

n. 目的;目的;[光] 物镜;宾格

He kept on towards his objective.

他朝着他的目的前进。

good-looking

adj. 漂亮的;美貌的

Finally, people like good-looking people.

最后，人喜欢长得漂亮的人。

provide

vt. 提供;规定;筹备;装备

vi. 规定;抚养;作筹备

I provide him with all his rights.

我向他提供了他的所有权利。