This robot is supposed to save a lot of labor, but it remains a problem if it ______.
It’s very important to eat healthy food, ______ you don’t like it.
We know the boy _______ father works in the police station.
This is the topic _______ we are talking about now.
Mrs. White doesn’t know her friend _______ to Beijing. If she _______ here, she will meet him at the station.
Chinese is one of ______ subjects in our school.