—Mary,I don’t know ____ you can come tomorrow morning.—No problem! I’ll be here _____I’m free then.
A little boy wrote____ "U" and___ "n" on the wall.
Bill Gates is from the _________..
含有A字母读音的字母是_________.
下列哪一组字母都能一笔完成_________.
— You look nice in this red skirt. —______.