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

A. As B. It C. This D. That

 

B

【解析】

試題分析：句意：醫(yī)療保障方面的進(jìn)步將使國家更強(qiáng)大與繁榮（這一觀點(diǎn)）是我們的信念。這里it 作形式主語, 后面的that 引導(dǎo)真正的主語從句，選B。

考點(diǎn)：考查it 作形式主語

 

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