My dad is going to Cuba . He will stay there for a week.A. on show B. on business C. on sale
—Where ______ my books, Mom? —I don’t know.
Look! This is ____ eraser. And _____eraser is my sister’s.
—________do you spell clock? —C-L-O-C-K.
— I ____ my ID card. I must _____ it.
— What color is the cup? —________.