我认识她大约12年了，我猜。

I've known her for about 12 years, ___I ___guess.

我猜我爱她，尽管我们彼此不太了解。

___I ___guess that I love her, although we don't know each other very well.

电影晚上8点开始，我猜。

The movie starts at 8 PM, ___I ___guess.