The students sometimes complain about their new teacher because he is too strict ____ them.
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?
—This evening your uncles are coming to our party.—So, we need _______ food.