—What are you going to do tomorrow?—_______ I _______ go hiking.
We______ a school trip next Wednesday if it is fine.
There isn't ______ in the classroom. Let’s turn off the lights.
Something was wrong with my bike, ______ I was late for school.
—Where is your Chinese teacher? —He’s ______the meeting room.
—Who is that lovely girl? —______ is my sister.