把下列句子转换为同义句It is so hard that I can't understand.= It's ____
把下列句子转换为同义句
It is so hard that I can't understand.
= It's _____ hard for me _______ understand.
I Inless we work out these problems,we on't relax.
= ______ we _______ work out these problems,we won't relax .