题目内容

7．As we all know，it is usually cold in this place in January，but it _____ be warm sometimes．（　　）
A．mustB．canC．shouldD．would

分析 众所周知，这个地方一月份通常冷，但是有时也会暖和．

解答 答案是B．本题考查表示推测的情态动词的用法．情态动词must表示推测只能出现在肯定句中，表示有客观依据的推测"准是，一定是"．can表示推测往往出现在否定句或疑问句中；在肯定句中出现时表示"客观上、理论上的可能性"，常常暗示可能性很小，与一般情况不相符．should表示推测时往往表示"按照常理常规的推测"，表示"按照道理应该…"；would表示推测时表示有充分理由的推测；本题中由上文的"usually cold"，判断"be warm"与一般情况不符，只是客观上的可能性，所以答案是B．

点评 要在正确理解情态动词的基本含义的基础上，整体理解语境中的情感态度，做出合理的判断．

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