一道SAT的语法题Thesedays,businessandsociallifeareconductedatapacethatpromptspeopletosende-mailsormakephonecallstocolleaguesandfriends【ratherthan】letters.ratherthan是要换掉的成分,这里有两个混淆选

　　一道SAT的语法题

　　Thesedays,businessandsociallifeareconductedatapacethatpromptspeopletosende-mailsormakephonecallstocolleaguesandfriends【ratherthan】letters.

　　ratherthan是要换掉的成分,这里有两个混淆选项：

　　A.ratherthanwrite

　　B.insteadoftowrite.

　　请说出答案并回答一下两个问题：

　　1.ratherthan和insteadof的区别.

　　2.这里为什么不能用insteadoftowrite