It is a matter of time they discover that John has left.该用before还是when为什么该用before和when哪个连词为什么

It is a matter of. It is just a matter of time. It is entirely a matter of preference Destiny is not a matter of chance,it is a matter of choice it is not a matter of怎么用 英语翻译it is a matter of congratulation.it is a letter of congratulation. “It is not a matter of what you want,it's a matter of what you do.”“It is not a matter of what you want,it's a matter of what you do. It is a matter of great honour.这是件极其光荣的事a matter of在这句话中是什么意思? It is the matter of time It won't be a matter of age if it is love. It is a matter of losy cheeks,redlips and supple knees,it is a matter of will,a quality of imaginati-on,a vigor of the emotions,it is the freshness of the deep springs of life. every great achievement is a dream before it becomes__(real).It is oniy a matter of time 英语翻译Desting is not a matter of chance;It is a matter of choica.It is not a thing to de waited for;It is a thing to de a chieved. Youth is not a time of life ,it is a state of mind,it is not a matter of rosy cheeks,red lips .. Love is not a matter of counting the days. It's making the days count.是什么意思? it does not matter which of the three states a thing is in怎么翻译 Life is not a matter of counting the days.It's making the days count. It is a matter of concern to 可否给例子?一个就可以了,