Nobody knows ____.A .what wrong is.B .when did he come back.C .if Kyle will play the solo.
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?