23.—It was careless of you___________your car unlocked all night. —Oh, dear! .
Such a problem is____difficult for a primary school student ___.
The railway was opened______traffic_______ April 4, 1985.
Ted has been absent_____class for quite some time.
He divided the sweets___the children who were divided ___three groups.
The pianist began to play and the girl in red began to sing ____the music.