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
答案：CBCB
详解：
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;目标的;宾格的
n. 目的;目标;[光] 物镜;宾格
He kept on towards his objective.
他朝着他的目标前进。
good-looking
adj. 好看的;美貌的
Finally, people like good-looking people.
最后，人喜欢长得好看的人。
provide
vt. 提供;规定;准备;装备
vi. 规定;抚养;作准备
I provide him with all his rights.
我向他提供了他的所有权利。
From:https://www.zgghmh.com/CET-4/20003989.asp