Peter, you should leave the light          when you’re out.

．—How is your English going? —      .

---Can you guess _________ the new Nike sports shoes?---Yes. Maybe he asked his grandpa to pay for them, I think.

We don’t want to speak badly or  ______ in front of the class.

There are too many students asking teachers to help in the teachers’ office, but this room is ____ small ____ hold them.