The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912. 

—What a mistake!—Yes. I________his doing it another way, but without 　success.

Upon their entering the tomb, Carter’s lucky pet bird, which he ____ in Cairo, was swallowed by a snake.

 The car ran down the hill, and the driver _____, according to the newspaper, to have been killed. 

---Where is mother? ---She is in the kitchen. She ___ the dinner for the party the whole afternoon.