问题
选择题
I think I had at least a billion tests, including _____ in which they cut out a piece of muscle from my leg and looked at it under a microscope.
A．that
B．the one
C．it
D．one
答案
D
本题考查one/ it/ that/ the one的指代用法。One是泛指，指可数名词单数，that，the one，it都是特指。本句意思指包括其中一次，是泛指的概念，所以选D