You can not find Sam.He ____(go)to the library.

You can not find Sam.He ____(go)to the library.
You can not find Sam.He ____(go)to the library.

You can not find Sam.He ____(go)to the library.
很高兴能够在这里回答你的问题,这道题的正确答案应该为：
has gone
你不可能找到萨姆.他已经去图书馆了.

has gone
说明不再用现在完成时