下列各句中，没有病句的一项是（3分）

My leg hurts a lot—-You’d better go to the doctor and have it ____

You haven’t been to the USA, have you— Buthow I wish to go there again!

If all of us give ________ helping hand, our world will be ________ better one.

You don’t need to make fancy foods to impressguests—it is something simple but good _____ will do.