1.Where is it that you saw his cellphone?
2.When was it that you found your car has been stolen?
3.It was what you said that broke our hearts.
4.It was until you explained that I understand it.
5.It was due to a car accident that he lost his legs.
6.You don't intend to attend his birthday party,do you?
(这句话似乎不好用 it is that)
7.Cling the chance or you will regret.
(这句话也不好用)