— Shall I tell John about it? — No，you _____. I don‘t know his t

— Shall I tell John about it? — No，you _____. I don‘t know his telephone number.
A、needn‘t
B、wouldn’t
C、mustn‘t
D、shouldn’t
【正确答案】：A
【题目解析】：needn’t表示“不必要”；mustn’t ，shouldn't 表示“禁止”“不应该”；wouldn’t表示“拒绝”。
根据题意应该选用不必要A