____if you make up your mind.A.It's sure of success B.It's certain to succeedC.Be sure of success D.You are certain to succeed
问题描述：
____if you make up your mind.
A.It's sure of success B.It's certain to succeed
C.Be sure of success D.You are certain to succeed
答
D
前面是一句完整的句子，You 作主语 be to succeed将要成功
答
D
答
D
A、B 中it无特定指代内容；
C 是一个祈使句,其主语还是,句子有表达你自己要确保成功的意思,而本题中是别人勉励你的,所以不行;
D be certain to do sth,主语只能是人,是肯定的意思,符合要求；
答
A