问题
选择题
______ 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
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。