The middle and high school period is a special one for children, a transition from children to adult, ______ children tend to be rebellious.
20. His parents were teachers in that school, _______ lost their lives in order to save their students in the earthquake.
19. __________ a chance, we will visit Edinburgh a second time.
18. — Hi, Kathy. We’re going to have a party this Saturday. Will you come? — __________. What time?
17. It’s said ______ ______ was everything _______ Mr. Professor could tell us.
16. I returned home with some roses and only then __________ find my favorite vase missing.