问题
选择题
China's success in manned－spacecraft travel shows ________ our country has become one of the greatest powers in space research.
A．what
B．which
C．/
D．it that
答案
答案：C
该句中的从句作shows的宾语，是宾语从句，又因为从句中不缺主、宾语，所以只能用that引导；又因引导宾语从句时that可以省略，所以答案是C。