Once a year , people take part in “ ______ Lights ” activity to help save energy .
—Would you mind turning down the music? —.
Last year I _________ drive. I used to take the bus.
These days my classmates are busy ________ ready for the final exam.
There’re too many clothes in the shop. I really can’t decide .
Mary prefers _______ to ________ . A. sing, dance B. sing, dancing C. singing, dancing