英语改错题C

1,The climate of Israel is somewhat like southern California.
southern 怎么改?为什么?
答：southern不用改.southern:adj.(often cap.) of or belong to the south part esp.of the world or a country:the southern US.
在之前加that of
2,I need both fine brown suger as well as powdered suger to bake a Hawaiian cake.
both 为什么要去掉?并求分析句子结构
答：I need both A and B.A和B 我都需要
I need A as well as B.我需要A以及B
to do sth.为了...,表示目的.在之前加that of that ofsouthern放在句中是什么结构或者说是用法？麻烦分析The climate of Israel is somewhat like that of southern CaliforniaThe weather in Beijing is cooler than that in Shanghai.that = the weather不能用it,因为it= the weather in Beijing.The climate of Israel is somewhat like that of southern California中that= the climate