26．We all think that it’s thoughtful _______ you to prepare so much delicious food for the party.
A．for B．of C．on D．that
27．I am used to going to bed early, but I have to stay up late ______.
A．at all times B．at times C．on time D．in time
28．—Do you mind playing for our football team?
—______. It’s my dream.
A．Better not B．Certainly not C．sorry, but I do D．Sure
