I thought that was dull to watch a game in which players kicked a ball to each o

I thought that was dull to watch a game in which players kicked a ball to each other.     

           A      B                  C            D

                                                          (    ) _____________

试题答案

A.

解析:

考查it的用法。that换成it 在本句中that改成it在句中作形式主语，真正的主语是后面的动词不定式。而且that是不能做形式主语的。