（）It’s time to_____ a new beginning.
A. start B. starting C. starts
（）What did you_____ on the earth?
A. buy B. buying C. bought
（）They _____going to different schools.
A. is B. are C. do
（）I _____the name of a friend.
A. write B. writing C. am write
（）There is _____ big bird in the tree.
A. a B. an C. the