—Who’s the man over there?Is he our English teacher?—No,he________be our English teacher.He________be our Chinese teacher because our Chinese teacher is much taller than our English teacher.
We drove our car to go _________ the tunnel.
Nobody helped me. I finished it by _________.
My pen pal Ann found it difficult ______ Chinese well.
---Can you tell me why you learn English so well ? ---It is very simple. _______ you work, ______ grades you will get.
---How is Susan? ---Oh, she lives abroad, so I ______ ever see her.