________ really enjoyable, ____________ us a valuable lesson.
The growing interest in ____ history is clearly evident in ____ number of people visiting museums and country houses.
If English ______ included in the examinations, few students would choose it.
The student will be suspended from school _____ he apologizes to his desk-mate before the class.
The small fishing village has ______ into a modern city in thirty years.
Mr. Keller ______ forty cigarettes a day until he gave it up.