–We can use it to chat with each other on the Internet. --Really? Will you please show me _______ it
Jack______ books in the library at 4 pm yesterday afternoon.
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.