根据上下文和首字母提示,将短文填写完整。 Su Hai and Su Yang are twin s . Su Hai is as o as SuYang. They are in the s class and they l the same. They are good at r and j . Su Hai runs f , but Su Yang jumps h . Su Yang is b at the long jump t Su Hai. They want to v Beijing in 2008.