剑桥的官方真题可不便宜，动不动五、六十，七、八十一本，整个几套，再加上点听力、口语、语法、阅读、写作的专项训练，四、五百块到小一千，就花出去了。 知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 通过这两年的备考�

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