is our belief that improvements in health care will lead to a stronger, more pro

_______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.

  A. As B. That    C. This    D. It

试题答案

D.

解析:

本题考查it作形式主语，代替that improvements in health care will lead to a stronger, more prosperous economy，而其他选项均不可以充当形式主语。