问题
选择题
— What should I do before operating the new machine?
— You’d better read its ______ first carefully.
A．explanations
B．instructions
C．descriptions
D．introductions
答案
答案：B
本题考查名词的词义辨析。explanations“解释，说明”；instructions“说明，指南”；descriptions“描绘，描写”；introductions“介绍，前言”。所以，根据句意应选B。
等。 