There are lots of ________ to do every day.
By the time I got to the airport, the plane ________.A. took off B. has taken off C. had taken off
The boss in the factory made the workers_______nine hours a day in the past.A. work B. to work C. working
I am a League Member. I volunteer my time _____ others.A. help B. to help C. helping
---What did you do on April Fool’s Day?---I played a trick ______ my brother.A. on B. to C. with
Look at that girl ______ name is Lucy.A. who B. whose C. which