It is difficult for us to learn a lesson in life _______ we've actually had that lesson.
---______is this girl?---she is my sister. ----______do you spell “sister”?---S-I-S-T-E-R.
________do people celebrate Christmas? Families usually have a big party.
What she have dinner?
—_______ cap is that? —It’s my cap.
It’s important ________ the piano well.