My teacher said to me with a smile, “Well, you ________ to worry about your lessons.”

important to pay your electricity bill on time, as late payments may affect your _________.

I never doubt _________his advice is of great _______to me.

It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.

Which one is________ in your school, football or basketball.