He jumped out of bed and ran to the door to see ________ the parcel was for.
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.
After graduation she reached a point in her career __________ she had to decide what to do.
We shouldn’t s0pent our money testing so many people, most of __________ are healthy.