Let’s clean the classroom. It's very ______.  

   A. dirty                 B. small              C. new              D. old

Let’s clean the classroom. It's very ______.

1. A.
   dirty
2. B.
   small
3. C.
   new
4. D.
   old

Let’s clean the classroom. It’s very ______.  

Let's help them_________ the classroom.

1. A.
   cleaning
2. B.
   cleans
3. C.
   clean
4. D.
   are clean