---- Are these your _______? ---- Yes, they’re my uncle’s sons.

 This is Elizabeth Tina Brown, our new teacher. You may call her __________.

—To keep healthy, you’d better eat more vegetables and fruits every day.—Thanks for your advice. I’ll have more_____________.

– How is the _______________ in Hangzhou?– Awful. There are always long lines of cars on roads. 

— What are the _______ doing there?— They are busy _______ their science experiment.