--- I rang you at about nine, but there was no reply.--- Oh, that was probably _______I was seeing the doctor.
Is this the reason at the meeting for his carelessness in his work?
It’s freezing outside. You ______put on your coat.
Jack asked his brother Betty.
I have heard from my father, is in American.
Swan Lake is a famous ballet(芭蕾) in four acts, ________ on a German fairy tale.