Of the two pens, the boy bought ______ expensive one at last.

My ______sister who works in the bank is two years______than I.

Yinchuan is an _______city than Wuzhong.

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

 Of the two shirts, I’d like to choose the_____ one to save some money for a cap.