为何用"that is"?

为何用that is? it is time that we should do something for our country.关系词为何用that My opinion is that you should not go alone. 此处为何用that is unexplainable为何用is this is the museum __you saw the other day 为何用that It is such difficult work that we can't finish it in a shout time.为何用such,不用such a 或者用so my teaching style is ___________to that of most other teachersalike 还是similar,similar不是跟人才加to吗,这是物,为何用它,alike怎么用 I think that we should be honest because being honest is not only .句中为何用being 而不用be?谢 I agree,but the problem is__he has refused to.为何用that 不用what?这是一个表语从句,从句里不是缺少宾语吗?I agree,but the problem is what he has refused to.what 做refused to what is that?It is C.为什么是 It is? Preparing all the needed items is important to successful project.请问为何用is. what is the sex of your children?后面是children复数,前面为何用单数is? None of us is interested in football.为何用is不用are The Reads_________(not listen) to the radio at that time.为何用were not listening I agree,but the problem is__he has refused to.为何用that 不用what he was one of the greatest writers that had ever lived.此处为何用that而不用who引导 the detective found out that the shop assistant was her daughter.out是介词从句为何用that引导? Eddie has to wait untill that bank has come to a decision:has come to 为何用现在完成式因为这个动作还没有完成,为何用完成式