1Little did he care about his own safety .
2 Not until I came home last night did Mum go to bed .
3 So sudden was the attack that the enemy had no time to escape .
4 Only by taking exercise will you be able to keep fit
5 Should it rain tomorrow ,we would put off the match
6 So quick is the light that we can't imagine the speed of it .
7 Gone are the days when he was carefree .
8 His voice is so beautiful .Never have I heard such a beautiful voice .
（貌似我們一個(gè)學(xué)校）純手打,不容易啊