. — Flight 551 for Dalas ______. I must be off now.
— Have a pleasant trip then.
| A．is being announced | B．has announced | C．was announcing | D．had been announced |
How pleased the boy was _____ what his parents said！
| A．hearing | B．heard | C．hear | D．to hear |
Was it _____ she heard with her ears _____ really made her frightened？
| A．what；that | B．it；that | C．that；which | D．what；／ |
Is this factory _____ you visited the other day？
| A．the one | B．that | C．where | D．when |
Who would you rather _____ the report instead of you？
| A．have written | B．have to write | C．write | D．have write |
Madame Curie, for _____ life had once been very hard, was successful later.
| A．whom | B．which | C．whose | D．that |