问题
选择题
Many people agree that knowledge of English is a must in international trade today.
A．a；／
B．the；an
C．the；the
D．／；the
答案
答案：A
此题重点考查冠词搭配。knowledge是个不可数名词，但a knowledge of为固定搭配，表示“某方面的知识”。“国际贸易”是抽象名词，前面不加冠词。