—I don’t know which skirt was ______, so I took them both.—Yes, it’s really difficult to choose.

____you study, ____grade you will get.

We should eat ________ fruit and vegetables, but ________ meat. It is good for our health.

 I think Hangzhou is one of ________ in China

— What do you think of the play?— I enjoy it very much. It’s the ______ one I have ever seen.