What about _____dictionary on the bookshelf? ---It’s very useful ,I think
____ old man behind Mary is _____ university teacher.
There is ______ “b” and _______“s” in the word “bookcase”.
---What color is it?---It’s______orange.It’s ______ orange pen.
What’s this? It’s “Nn” and “u”.
_____ hat is Mrs Li's. It's _____ old one.