—It’s a fine day today. Shall we go swimming?—______ But we need to be home before six o’clock.
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?