Would you like to __________us in watering flowers?
—Where is your Chinese teacher? —He’s ______the meeting room.
—Who is that lovely girl? —______ is my sister.
—Excuse me, can you tell me ________? —Sorry, I’m a stranger here.
—Have you found the book ________ you lost yesterday? —Yes. I left it in the library.
Hurry up! The plane will ________ at six o’clock.