1)词性的替换
a)名词和动词的'替换
e.g. According to the accommodation rules， _________ cant be changed.
原文：You must remember that no changes can be made to the meal time.
b)名词和形容词的替换
e.g. _________ is a necessity.
原文：Its necessary to protect the environment.
2)数字的替换
e.g. Most bottle makers use about __% recycled glass.
原文为Er， the bottles made in most places contain about three-quarters new glass and the rest is recycled.
还有： a quarter=1/4=25%
In the 1900s=in the 20th century
Score=20 Dozen=12 Decade=10
3)语态的替换
e.g.___________________ provides work for 30 million people
原文： 30 million people earn a living by growing coffee.
4)同义词和词组的替换
e.g. The pressure on the coastal zone resulted from________
原文： The population shift contributed a lot to the pressure on the coastal zone.
