Unlock l3 （第三级）：b1，对应 pet，对应 公立初中毕业 时水平； unlock l4 （第四级）：b2，对应 fce，对应 公立高中毕业时 水平； unlock l5 （第五级）：c1，对应 cae，对应 优秀高中毕业或. The views expressed on this forum are not endorsed by. Unlock l4 （第四级）：b2，对应 fce，对应 公立高中毕业时 水平； unlock l5 （第五级）：c1，对应 cae，对应 优秀高中毕业或大学生水平。 也就是说，这套书从孩子有一定英语基础开始，一直覆盖.
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