---This is my father ---Hello , ____ Liu.
---The book is on Lily’s desk. _______it is hers. --- No, it _______ Lucy.
--- Can you tell me why you learn English so well?--- It’s very simple. ______ you study, _______ grades you will get.
The baby is always crying. He _______ be hungry.
My parents are patient _________ me.
The words are too difficult. I must ______.