1、He will surely finish the job on time ________ he's left to do it in his own way.

　　A.in that　　B.so long as　　C.in case　　D.as far as

　　2、If this kind of fish becomes ________, future generations may never taste it at all.

　　A.minimum　　B.short　　C.seldom　　D.scarce

　　3、Agriculture was a step in human progress ________which subsequently there was not anything comparable until our own machine age.

　　A.in　　B.for　　C.to　　D.from

　参考答案：

　　1、D　2、B　3、C