A:did he go
B:he did go
C:went he
D:he went
— Please take a seat. The speech is going to start.
—Oh, I'm looking for my seat.
16的算术平方根是____ ,5﹣2的相反数是____ ,-83的绝对值是____
①生命是宝贵的,值得珍爱 ②生命是坚韧和顽强的
③生命是脆弱的,需要呵护 ④对生命的尊重和敬畏