49. So far as I have been able to discover ， there are four basic alternatives.
（1）so far as ： =as far as ， to the extent that 就……而言，从……来看。
如：His conduct ， so far as I can see ， is unjustifiable .
（2）alternative ： one of more than two possibilities 数种可能之一，可代替的。
如：There are alternative answer to this question .
An alternative plan is to apply for a loan.