【内蒙古呼和浩特市2015年中考英语试题】 --- Excuse me, may I come in?--- Not yet. Please wait on your chair _____ your name is called.
He is tall, _____ his son is short.
What can we students do _____ the environment?
There are five people in the room, but I know _____.
—What did our geography teacher say? —She told us that the earth _____ around the sun.
—Lily, _____ you _____ your ticket? —Not yet!