这是几道高一英语练习填空
1.( ) in his swimming suit,Peter dived into the pool.A.Dressed B.To dress C.Dressing D.Having dressed 2.The bridge ( ）a century ago was destroyed by floods last year.A.having been built B.built C.building D.to having been built （这两道题我都有答案,就是不知道为什么要选?）