It was the boy _____ had been in prison _____ stole the money.
A. who, where B. that, how
C. who, that D. that, which
It was the boy _____ had been in prison _____ stole the money.
A. who, where B. that, how
C. who, that D. that, which
C
全句为强调句，被强调成分是 the boy (以及修饰它的定语从句who had been in prison)。