The science of medicine,_____progress has been very rapid lately,is perhaps the most important of all the sciences

问题描述:

The science of medicine,_____progress has been very rapid lately,is perhaps the most important of all the sciences
A,to which B,in which
C,which D,with which
I,who_____youre friend,will try my best to help you
A,be B,am C,are D,is
Even at the moment he didn't come to our help,_____made us very disappointed
A,who B.that C,which D,what
Is there anyone in your class_____family is in the city?
A,whose B,which C,who's D,who
要写为什么具体一点

B the progress in the science of medicine,所以用in which
D 理论上是am 但实际用is代替
C 代替前面句只能用which
A 表物主whose