_ your diet, it is easy to reduce.

The chairman ________ hold office for five years according to the constitution.

People change all through the months and years, but a photograph always remams ___________.

13．About 90 percent of the equipment presented by the administration，as well as the facilities ofour own，______made good use of in teaching．

you beento the Great Wall—Perhaps notin my memory. ________, it might have been during my early childhood.