他们在学校时是最好的朋友，但毕业后就疏远了。

They were best friends in school, but after graduation, they ___drifted ___apart.

随着时间的推移，他们的兴趣改变了，开始疏远。

Over time, their interests changed and they began to ___drift ___apart.

没有定期沟通，即使是亲密的朋友也可能疏远。

Without regular communication, even close friends can ___drift ___apart.