The first textbook__for teaching English as a foreign langue came out in the 16th century.A written B to be written为什么不选B选A呢?

问题描述:

The first textbook__for teaching English as a foreign langue came out in the 16th century.
A written B to be written为什么不选B选A呢?

这句话是which was written ,witch was 可以省略,所以就是一个written就行啦…