–Whose is this purple scarf?–It _______ be Mary’s. She always wears a purple scarf like this.
This kind of clothes looks cool ___________.
---How much do I need to _______ you for this book? ---Twenty yuan.
---What are you doing at the moment? ---I am ______ my turn to borrow books.
He is_____American.I’m_____E nglish.
There are _____pens_____pencils in the box.