“I haven't heard from Henry for a long time.”“What do you suppose_____ to him?”
It has been announced that candidates(应考者) ________ remain in their seats until all the papers have been collected.
I ________ pay Tracy a visit, but I am not sure whether I will have time this Sunday.
The book was written in 1946, __________ the education system has witnessed great charges.
—Where did you get to know her?—It was on the farm __________ we worked.
Some pre-school children go to a day-care center, __________ they learn simple games and songs.