is important for all of us English loudly in the morning.A. It; to readB. That; to readC

问题补充：

is important for all of us English loudly in the morning.

A. It; to read

B. That; to read

C. It; reading

D. That; reading

答案：

(答案→)A. It; to read

B. That; to read

C. It; reading

D. That; reading

解析：考查“it is +adj. +for sb. to do sth.”句型。其中，it是形式主语，真正的主语是动词不定式（to do sth.）,不定式太长，为避免头重脚轻而用it代替，同时，把不定式放在句尾。