Why the explosion occurred was ____the laboratory attendant had been careless.
The question came up at the meeting_____ we had enough money for our research.
This cake is very sweet.You __________ a lot of sugar in it.
Having no child of their own, the Smiths took in a _____ girl, Yuan Yuan by name.
What was it ________ he was so eager to get?
With the meal ________, the mother sat down for a good rest.