Only after the woman had her own child how difficult it was to be a mother.
The thought of going back home was _______ kept him happy while he was working abroad.
Although medical science __________ control over several diseases,what worries us is that some of them are returning.
---What happened to the house ? ---It_____burnt to the ground. A is said to having been B. is supposed to have been C is reported to have been D. is believed to have
---You must obey every word of mine! ---_______ I don’t?
How long do you think it will be _______ China sends another manned spaceship to the moon?