A terrible thought Mr. Smith when he was leaving for work: what if an accident happened while his son was alone at home?
When I passed by, I heard her _____ in the room.
We are going to visit an old temple _____ the 12th century.
I’ll lend you my bike_____ you take care of it.
It was when she was sleeping in her bedroom __________ a thief broke into the house.
Future agriculture should depend on high technology __________ traditional methods.