Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
Do you often help your father ___ the farm work during the summer vacation?
They sometimes go on working ___ the light of the moon.
He has never been to France, ___ Harry.
They don't study in NO 1 middle school, ___ those boys.
Bill was staying on a farm with his uncle last summer. So ___ Mary.