I usually do some cleaning ____ Sunday morning.[ ]

Many teenagers show interest in the books that are written ________ Guo Jingming.—That’s true. My son says he can get what he thinks and wants in his books.[ ]

He was crossing over to _____ side of the road when I saw him.

I wonder if it is going to rain this Sunday.-If it _______ ,I’Il have to stay at home.[ ]

She often _______ a white hat.