After_____silence,they began to write to each other.

问题描述:

After_____silence,they began to write to each other.
A a three-year B three-year
感觉three-year 就可以了,为什么前面要加a呢?

这里silence 是可数名词,意义:无音信, 无联系
如, Forgive me for such a long silence.
请原谅我好久没给你写信.

希望满意,祝您进步:)