Question

The genetic engineering, ______ progress has been very rapid recently, is perhaps the most impo...

The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences． A．to which B．with which C．in which D．for

Answer 1

C

考查定语从句。have rapid progress in在……有迅速的进步，故用in which，选C。