His aunt’ s letters ________ him of those beautiful days when they used to live together in his hometown.

Before the hostess _____ the winner, she asked the audience to calm down. [ ]

What did you see, Lingling —I saw a lot of trees on ___ __ of the lake.

Help others whenever you can _____ you will make the world a nicer place to live in[ ]

Do you think there will be robots in school —— .