When you get on a bus, it’s polite to wait for ________ turn.
A: How do you like the Disney film Frozen? B: _________
A: Would you like me to show you around the Bund? B: ________
Many people are wondering ________.
I’ll invite you to my new flat as soon as I finish ________ it.
Listen! The teachers ________ a discussion in the meeting room at the moment.