The old man _____ yesterday is a scientis A. I spoke      B. I spoke toC. whom I spoke   D. that I spoke to him麻烦解释一下为什么不选D

问题描述:

The old man _____ yesterday is a scientis A. I spoke      B. I spoke to
C. whom I spoke   D. that I spoke to him麻烦解释一下为什么不选D