1.My parents wish that I would be enrolled by an excellent university,I think I won't let them down.
2.Safe and Sound were the children when they came back (这句我不太确定)
3.He ordered that we should finish the work at once(虚拟,should 可以省略)
He odered us to finish the work at once (order sb.to do sth.)
4.He suggested that we should build a bridge over the river (虚拟,should 可以省略)
He suggested us to build a bridge over the river (suggest sb.to do sth )