Studying hard makes（） possible for me to go to university successfully
问题描述：
Studying hard makes（） possible for me to go to university successfully
A it B that C it's D this
答
Studying hard makes（A it ） possible for me to go to university successfully为什么？it做形式主语，真正的主语是不定式 to go to university successfully.后面possible，it做形式主语，为什么不加is放在possible的前面？这是一个一般现在时的句子，已经有动词make，不需要再加系动词is