While we were running on the playground, Jack suddenly stopped and lay on the ground, so we all stopped what was wrong with him.A. to run; to see B. running; seeing C. running; to see
He is very clever. At age 6, she _____to play the piano.
All the classmates _____ in that match.
Tina’s house is a beautiful building ______a big garden.
_______to ride a bike from your school to the park?
Do you like travelling from one city to ___________?