---Wow, so many new houses! I can’t believe that. It used to be a poor village. --- Yes,_________ has changed here.
I don’t like doing the cleaning, because it is ________.
The boy spent 10 dollars ________ the model plane.
America is a ________ country. A.develop B.development C.developing D,developed
We should keep our classroom _______.
Would you please ________ my dog when I go out for travelling?