-Our classroom__________ every day.-So it is. It’s our duty to keep it clean and tidy.A. cleans B. is cleaning C. is cleaned
---What color is it? ---________________.
--- Is your favorite subject Math? --Yes, I am good ___it.
—How many ____are there in the box? --Nine.
–What’s this in English? ---______.
There ____ many kinds of flowers in the garden.