. I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.
Many a man and many a woman _____ that he or she had better education.
_____ it is _____ you obtain, you should share _____ your parents your feelings.
About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.
People take naps at noon in warmer climates, ____ the heat makes work difficult in the early afternoon.
--- What do you think of this novel? --- Er … sorry. I _____. What did you say?