Definition: to not know what is happening to someone or something any more Level: B2
他忘记了自己读了多少本书。
He ___lost ___track of the number of books he read.
我们看电影时忘记了时间。
We ___lost ___track of time while watching the movie.
朋友们搬走后，我就不知道他们的近况了。
I ___lose ___track of my friends after they move away.
