The villagers dug many tunnels _____ they could fight against the enemies.
—What do you think makes him so sad? — __________ the exam.
Ladies and gentlemen, please fasten your seat belts. The plane __________.
When delivering the speech, you can __________ your note if necessary.
—I'm going to travel to America. Would you consider telling me about your experiences there? — __________. Let's discuss it over dinner.
Not until he left his home __________ to know how important the family was for him.